And for many "big-a* text files" I'd recommend org-mode. It also has its own markup (much more powerful than markdown), and can also do spreadsheets (which I pe

And for many "big-a* text files" I'd recommend org-mode. It also has its own markup (much more powerful than markdown), and can also do spreadsheets (which I personally use only marginally). Manage this in git and you are independent of any service, yet with extensive-- perhaps even uncontested --feature-coverage.