A couple of weeks ago I took over a package from havber, He didn’t have time to maintain it anymore and I thought it was a good idea since I didn’t like the other packages for this purpose.
comment for Atom is a very simple package, It comments the current line or multiline with a key binding.
For now I’ve been merging pending pull requests, adding unittests and refactoring. You can follow the development on github and install it through the Atom package manager. :-)