diff --git a/assetActions.config.js b/assetActions.config.js
index 4896380c0..555ed2a43 100644
--- a/assetActions.config.js
+++ b/assetActions.config.js
@@ -1,9 +1,20 @@
+//import Felt from './src/actions/assets/Felt.js';
+import Cesium from './src/actions/assets/Cesium.js';
 import CopcViewer from './src/actions/assets/CopcViewer.js';
+import F3D from './src/actions/assets/F3D.js';
 import GeoJsonIo from './src/actions/assets/GeoJsonIo.js';
-//import Felt from './src/actions/assets/Felt.js';
+// import Geofox from './src/actions/assets/Geofox.js';
+// import Geoparquet from './src/actions/assets/Geoparquet.js';
+// import Potree from './src/actions/assets/Potree.js';
+import Protomaps from './src/actions/assets/Protomaps.js';
 
 export default {
+  //Felt
+  Cesium,
   CopcViewer,
+  F3D,
   GeoJsonIo,
-//Felt
+  // Geoparquet, // not ready yet
+  // Potree,
+  Protomaps,
 };
\ No newline at end of file
diff --git a/docs/actions.md b/docs/actions.md
index 12138addd..75d4969d9 100644
--- a/docs/actions.md
+++ b/docs/actions.md
@@ -47,6 +47,44 @@ import GeoJsonIo from './src/actions/assets/GeoJsonIo.js';
 export default { GeoJsonIo };
 ```
 
+### OGC3dTiles
+
+Adds an `Open in Geofox.ai` button that allows to open OGC 3D Tiles files on <https://viewer.geofox.ai> or Cesium Sandcastle.
+
+```js
+import OGC3dTiles from './src/actions/assets/OGC3dTiles.js';
+export default { OGC3dTiles };
+```
+
+### geoparquet.info
+
+Adds an `Open in geoparquet.info` button that allows to open GeoParquet files on <https://geoparquet.info>.
+
+```js
+import Geoparquet from './src/actions/assets/Geoparquet.js';
+export default { Geoparquet };
+```
+
+### potree.org
+
+Adds an `Open in potree.org` button that allows to open COPC and Potree files on <https://potree.org> (via [Darren Wiens](https://mpc-copc-viewer.netlify.app) or [Iconem](https://3d.iconem.com/tools/load_potree_project_from_urlparam.html) apps)
+
+```js
+import Potree from './src/actions/assets/Potree.js';
+export default { Potree };
+```
+
+### pmtiles.io
+
+Adds an `Open in pmtiles.io` button that allows to open Protomaps PMTiles files on <https://pmtiles.io>.
+
+```js
+import Protomaps from './src/actions/assets/Protomaps.js';
+export default { Protomaps };
+```
+
+
+
 ## Links
 
 All actions for links are stored in the folder [`src/actions/links`](../src/actions/links).
@@ -61,4 +99,22 @@ The link to the XYZ has to follow the [web-map-links extension](https://github.c
 ```js
 import Felt from './src/actions/links/Felt.js';
 export default { Felt };
+```
+
+### pmtiles.io
+
+Adds an `Open in pmtiles.io` button that allows to open Protomaps PMTiles files on <https://pmtiles.io>.
+
+```js
+import Protomaps from './src/actions/assets/Protomaps.js';
+export default { Protomaps };
+```
+
+### OGC3dTiles
+
+Adds an `Open in Geofox.ai` button that allows to open OGC 3D Tiles files on <https://viewer.geofox.ai> or Cesium Sandcastle.
+
+```js
+import OGC3dTiles from './src/actions/assets/OGC3dTiles.js';
+export default { OGC3dTiles };
 ```
\ No newline at end of file
diff --git a/linkActions.config.js b/linkActions.config.js
index 04e566c4b..44ed63380 100644
--- a/linkActions.config.js
+++ b/linkActions.config.js
@@ -1,5 +1,10 @@
-//import Felt from './src/actions/links/Felt.js';
+// import Felt from './src/actions/links/Felt.js';
+// import Geofox from './src/actions/links/Geofox.js';
+import Cesium from './src/actions/links/Cesium.js';
+import Protomaps from './src/actions/links/Protomaps.js';
 
 export default {
-//Felt
+    // Felt, 
+    Cesium, 
+    Protomaps
 };
\ No newline at end of file
diff --git a/src/actions/assets/Cesium.js b/src/actions/assets/Cesium.js
new file mode 100644
index 000000000..467b9be43
--- /dev/null
+++ b/src/actions/assets/Cesium.js
@@ -0,0 +1,50 @@
+import AssetActionPlugin from "../AssetActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+// See mime types discussion for 3d-tiles here and there
+// https://github.com/opengeospatial/ogcapi-3d-geovolumes/issues/13
+const OGC3DTILES_SUPPORTED_TYPES = [
+  // 'application/json',
+  'application/3dtiles+json',
+];
+
+export default class Cesium extends AssetActionPlugin {
+
+  get show() {
+    return this.component.isBrowserProtocol && OGC3DTILES_SUPPORTED_TYPES.includes(this.asset.type);
+  }
+
+  get uri() {
+    // https://sandcastle.cesium.com/standalone.html vs https://sandcastle.cesium.com/index.html
+    let uri = new URI("https://sandcastle.cesium.com/standalone.html");
+    const tileset_url = this.component.href;
+    const code_payload = {
+      html: `
+        <style> @import url(../templates/bucket.css); </style>
+        <div id="cesiumContainer" class="fullSize"></div> 
+      `, 
+      code: `
+        const viewer = new Cesium.Viewer("cesiumContainer", {
+          terrain: Cesium.Terrain.fromWorldTerrain(),
+        });
+
+        try {
+          const tileset = await Cesium.Cesium3DTileset.fromUrl('${tileset_url}');
+          viewer.scene.primitives.add(tileset);
+          viewer.zoomTo(tileset);
+        } catch (error) {
+          console.log('Error loading tileset');
+        } 
+      `.replaceAll('        ', '')
+    };
+    const code_str = btoa(JSON.stringify(code_payload));
+    uri.addQuery('code', code_str);
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Cesium Sandcastle'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/assets/CopcViewer.js b/src/actions/assets/CopcViewer.js
index 0159929cd..7c8ff8922 100644
--- a/src/actions/assets/CopcViewer.js
+++ b/src/actions/assets/CopcViewer.js
@@ -5,7 +5,10 @@ import i18n from "../../i18n";
 export default class CopcViewer extends AssetActionPlugin {
 
   get show() {
-    return this.component.isBrowserProtocol && this.asset.type === 'application/vnd.laszip+copc';
+    return this.component.isBrowserProtocol && (
+      this.asset.type === 'application/vnd.laszip+copc'
+      ||  URI(this.asset.href).filename() == 'ept.json'
+    );
   }
 
   get uri() {
diff --git a/src/actions/assets/F3D.js b/src/actions/assets/F3D.js
new file mode 100644
index 000000000..d4d56e5b9
--- /dev/null
+++ b/src/actions/assets/F3D.js
@@ -0,0 +1,45 @@
+import AssetActionPlugin from "../AssetActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+// obj & ply files are usually with mime-type text/plain 
+const F3D_SUPPORTED_TYPES = [
+  'model/gltf-binary', 
+  'model/gltf+json',
+  'application/fbx',
+];
+// below is usually text/plain
+const F3D_SUPPORTED_FILEEXTS = ['obj', 'ply', 'fbx', 'glb', 'gltf'];
+export default class F3D extends AssetActionPlugin {
+
+  get show() {
+    const suffix = URI(this.asset.href).suffix();
+    return this.component.isBrowserProtocol && (
+      F3D_SUPPORTED_TYPES.includes(this.asset.type)
+      || F3D_SUPPORTED_FILEEXTS.some(ext => (suffix === ext))
+    );
+  }
+
+  get uri() {
+    // `https://f3d.app/web/#model=${modelUrl}` see PR merged for parsing model url and extension: https://github.com/f3d-app/f3d/pull/1596
+    // Could enforce extension to help f3d.app determine the mesh type and loader to use
+    let uri = new URI("https://f3d.app/web");
+    uri.addQuery("model", this.component.href); 
+    uri = uri.toString().replace('?', '#');
+    return uri;
+  }
+
+  get uri_3dviewer() {
+    // `https://3dviewer.net/#model=${modelUrl}` misconception, # is not a fragment but a query, can be replaced
+    // let uri = new URI("https://3dviewer.net/");
+    // uri.addQuery("model", this.component.href); 
+    // uri = uri.toString().replace('?', '#');
+    let uri = `https://3dviewer.net/#model=${this.component.href.replace('%2F', '/')}`;
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'f3d.app'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/assets/Geofox.js b/src/actions/assets/Geofox.js
new file mode 100644
index 000000000..79aa59abb
--- /dev/null
+++ b/src/actions/assets/Geofox.js
@@ -0,0 +1,28 @@
+import AssetActionPlugin from "../AssetActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+// See mime types discussion for 3d-tiles here and there
+// https://github.com/opengeospatial/ogcapi-3d-geovolumes/issues/13
+const OGC3DTILES_SUPPORTED_TYPES = [
+  // 'application/json',
+  'application/3dtiles+json',
+];
+
+export default class Geofox extends AssetActionPlugin {
+
+  get show() {
+    return this.component.isBrowserProtocol && OGC3DTILES_SUPPORTED_TYPES.includes(this.asset.type);
+  }
+
+  get uri() {
+    let uri = new URI("https://viewer.geofox.ai/");
+    uri.addQuery('tileset', this.component.href);
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Geofox.ai'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/assets/Geoparquet.js b/src/actions/assets/Geoparquet.js
new file mode 100644
index 000000000..a6930f4cf
--- /dev/null
+++ b/src/actions/assets/Geoparquet.js
@@ -0,0 +1,27 @@
+import AssetActionPlugin from "../AssetActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+const GEOPARQUET_SUPPORTED_TYPES = [
+  'application/vnd.apache.parquet',
+  'application/x-parquet' 
+];
+
+export default class Geoparquet extends AssetActionPlugin {
+
+  get show() {
+    return this.component.isBrowserProtocol && GEOPARQUET_SUPPORTED_TYPES.includes(this.asset.type);
+  }
+
+  get uri() {
+    let uri = new URI("https://geoparquet.info");
+    uri.addQuery('url', this.component.href);
+    return uri;
+  }
+
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Geoparquet.info'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/assets/Potree.js b/src/actions/assets/Potree.js
new file mode 100644
index 000000000..08a489a56
--- /dev/null
+++ b/src/actions/assets/Potree.js
@@ -0,0 +1,48 @@
+import AssetActionPlugin from "../AssetActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+const POTREE_SUPPORTED_TYPES = [
+  'application/vnd.laszip+copc',
+];
+
+// this.component.filename.endsWith or this.asset.href.includes
+const POTREE_SUPPORTED_FILEEXTS = [
+ 'cloud.js', 'metadata.json', 'ept.json'
+ // potree v1, potree v2, EPT Entwine Point Tiles
+];
+  
+export default class Potree extends AssetActionPlugin {
+
+  get show() {
+    // todo: this should check for the pointcloud extension or other indications that this asset is actually point cloud related
+    // as the metadata.json matching is rather greedy. Should be possible once stac-js is implemented.
+    return this.component.isBrowserProtocol && (
+      POTREE_SUPPORTED_TYPES.includes(this.asset.type)
+      || POTREE_SUPPORTED_FILEEXTS.map(
+        f => URI(this.asset.href).filename().endsWith(f)
+      ).some(e => e)
+  );
+  }
+
+  get uri() {
+    // Docs: PR made to original potree repo to avoid relying on iconem own infrastructure
+    // https://github.com/potree/potree/pull/1456 
+    // would be accessible via https://potree.org/potree/examples/load_potree_project_from_urlparam.html
+    // Can also parse pointSize, FOV, opacity, edlEnabled, edlRadius, edlStrength, pointBudget, showBoundingBox, pointSizing, quality, position, target, background via loadSettingsFromURL
+    // Alternatives with single potree-supported tileset support and less param parsed
+    // https://mpc-copc-viewer.netlify.app?c=rgba&r= Darren Wiens app, which works eg with IGN COPC: 
+    // https://potree.org/potree/examples/copc.html?c=rgba&r= Potree copc app
+    let uri = new URI("https://3d.iconem.com/apps/load_potree_project_from_urlparam");
+    const datasetUrl = this.component.href;
+    uri.addQuery('fit', 'true');
+    uri.addQuery('c', 'elevation'); // rgba, elevation, intensity etc
+    uri.addQuery('datasetsUrls', `["${datasetUrl}"]`); 
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'potree.org'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/assets/Protomaps.js b/src/actions/assets/Protomaps.js
new file mode 100644
index 000000000..23227ccf8
--- /dev/null
+++ b/src/actions/assets/Protomaps.js
@@ -0,0 +1,30 @@
+import AssetActionPlugin from "../AssetActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+// obj & ply files are usually with mime-type text/plain 
+const PROTOMAPS_SUPPORTED_TYPES = [
+  'application/vnd.pmtiles',
+];
+
+export default class Protomaps extends AssetActionPlugin {
+
+  get show() {
+    // Rather check if .pmtiles substring present in this.asset.href or simply this.component.filename.endsWith('pmtiles')
+    return this.component.isBrowserProtocol && (
+      PROTOMAPS_SUPPORTED_TYPES.includes(this.asset.type)
+      ||  URI(this.asset.href).suffix() == 'pmtiles'
+    );
+  }
+
+  get uri() {
+    let uri = new URI("https://pmtiles.io/");
+    uri.addQuery("url", this.component.href); // returns the URI instance for chaining
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Protomaps'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/links/Cesium.js b/src/actions/links/Cesium.js
new file mode 100644
index 000000000..32d76f899
--- /dev/null
+++ b/src/actions/links/Cesium.js
@@ -0,0 +1,43 @@
+import LinkActionPlugin from "../LinkActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+export default class Cesium extends LinkActionPlugin {
+
+  get show() {
+    return this.link.rel === '3d-tiles';
+  }
+
+  get uri() {
+    // https://sandcastle.cesium.com/standalone.html vs https://sandcastle.cesium.com/index.html
+    let uri = new URI("https://sandcastle.cesium.com/standalone.html");
+    const tileset_url = this.link.href;
+    const code_payload = {
+      html: `
+        <style> @import url(../templates/bucket.css); </style>
+        <div id="cesiumContainer" class="fullSize"></div> 
+      `, 
+      code: `
+        const viewer = new Cesium.Viewer("cesiumContainer", {
+          terrain: Cesium.Terrain.fromWorldTerrain(),
+        });
+
+        try {
+          const tileset = await Cesium.Cesium3DTileset.fromUrl('${tileset_url}');
+          viewer.scene.primitives.add(tileset);
+          viewer.zoomTo(tileset);
+        } catch (error) {
+          console.log('Error loading tileset');
+        } 
+      `.replaceAll('        ', '')
+    };
+    const code_str = btoa(JSON.stringify(code_payload));
+    uri.addQuery('code', code_str);
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Cesium Sandcastle'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/links/Geofox.js b/src/actions/links/Geofox.js
new file mode 100644
index 000000000..c93bd0607
--- /dev/null
+++ b/src/actions/links/Geofox.js
@@ -0,0 +1,21 @@
+import LinkActionPlugin from "../LinkActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+export default class Geofox extends LinkActionPlugin {
+
+  get show() {
+    return this.link.rel === '3d-tiles';
+  }
+
+  get uri() {
+    let uri = new URI("https://viewer.geofox.ai/");
+    uri.addQuery('tileset', this.link.href);
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Geofox.ai'});
+  }
+
+}
\ No newline at end of file
diff --git a/src/actions/links/Protomaps.js b/src/actions/links/Protomaps.js
new file mode 100644
index 000000000..1ac790402
--- /dev/null
+++ b/src/actions/links/Protomaps.js
@@ -0,0 +1,22 @@
+import LinkActionPlugin from "../LinkActionPlugin";
+import URI from 'urijs';
+import i18n from "../../i18n";
+
+export default class Protomaps extends LinkActionPlugin {
+
+  get show() {
+    return this.link.rel === 'pmtiles'; 
+    // could also check if this.link.type === "application/vnd.pmtiles" 
+  }
+
+  get uri() {
+    let uri = new URI("https://pmtiles.io/");
+    uri.addQuery("url", this.link.href); 
+    return uri;
+  }
+
+  get text() {
+    return i18n.t('actions.openIn', {service: 'Protomaps'});
+  }
+
+}
\ No newline at end of file