- Create an account on Flattr.com (mine is here);
- Submit the URL of your free software project to the Flattr directory with a good description and the proper tags (here’s my entry for dpkg);
- Add a Flattr button on your website (I put one on wiki.debian.org/Teams/Dpkg);
- Inform your users and reach out to free software users using Flattr by registering your project in Flattr FOSS.
And right now only 30K people are using Flattr. I expect this number to increase significantly now that invites are no longer required to open a Flattr account (see the announce on Flattr’s blog).
It’s time to spread the word about Flattr FOSS!