[sethammons]

Pretty sure these count:

ctrl+r (reverse search) on steroids: fzf (https://github.com/junegunn/fzf)

put a symlink to my dot files to a dropbox folder (always backed up .bash_profile or whatnot)

ssh tunnel to expose a port from a remote server on my computer: ssh -L 8500:localhost:8500 $remotehost

expose a port on my machine to the internet (demos and such): https://ngrok.com/

git bash prompt and git completion: know at a glance the branch I'm on and if there is un-staged/un-committed code. Allow tab complete for remotes and branch names. Lots of options here.

autojump (https://github.com/wting/autojump): `j foo` will jump directories to my /whatever/foo directory. Better than popd and pushd.

And before I had it baked into my prompt: `echo $?` to show the exit code of my last command.