I'm a long-time user of free/open source software, and write various things for both fun and profit. I don't take myself all that seriously and I do all of my own stunts.
You can find me at these fine establishments on the web: Open Source Musings, The Monday Kickoff, Weekly Musings. and The Plain Text Project.
Authored Comments
Great advice. With a little tweaking, you can apply each tip to just about any career. Yes, including professional writing! :-).
I heartily second Seth's recommendations of Atom and Remarkable. You might also want to look at Ghostwriter (https://github.com/wereturtle/ghostwriter) too.