Wiki Source Editor is an Open Source tool that allows you to view and edit the source code of any public wiki on Github. More importantly, it gives you the ability to share your modifications with others, so that you can collaborate on a wiki together.
You can use this tool locally or online. Currently it's hosted in this repository, so you can use it by visiting the link below.
https://sethclydesdale.github.io/wiki-source-editor/
Check out the help page for more information on using this tool!