Unity Pomodoro is now available on the Steam Store! (v.2.4.0)
If you'd like to download Unity Pomodoro for other platforms, check out the GitHub releases page: https://github.com/adrian-miasik/unity-pomodoro/releases
Code is open-source and changes are definitely most welcome. Be sure to check out the contribution document for more information on how to contribute.
If you'd love to see a specific feature or report a bug, the Steam forums or the GitHub page are both acceptable places to post your feature wishlist, worries, and/or concerns. I'll be keeping an eye out on both platforms.
Thanks for the support thus far.
-Adrian