Another post today asked a question similar to above, but in reference to a specific app.

It made me wonder, what have you recently (or not so recently) started using that makes you feel like you can't live/work without it?

For me, that would be:

- I3 tiling window manager (seen here on HN).

- OneTab firefox tab consolidator (seen here on HN).

- Vagrant.

- And from the past, Vim.