Where can I find information to set up ConTeXt on Sublime Text 3. I really like this editor and I have used it to create my documents in Latex/Latextools. But now, I am learning about ConTeXt and I would love to use my favorite editor.
There is now a Sublime Text 3 package for ConTeXt, called Simple ConTeXt. Maybe it will do what you want: it includes syntax highlighting, a build system, and some auto-completion stuff.
Disclaimer: I am it's author. I felt the same as you, that I like Sublime as a text editor, and desired some quality of life things when writing ConTeXt documents with it. So I tried to remedy the situation myself, as best as I could. Any feedback or issues/pull requests etc. are welcome, though I can't guarantee I'll have the time to look at them.