Lovebird is an alternative inbox based on the theory that an interface should help you focus your attention on the most important things, not just the newest things.
Most interfaces show the newest incoming messages on top. That means that even if you opened your email program with the idea in mind of writing an important email, you are soon distracted by a bunch of irrelevant mailing list messages - just because they happen to be the newest incoming mail, they push the important stuff down off the front page of your inbox.
Lovebird provides a separate tab just for your most important people. You can add someone to this list by clicking a heart next to their name. In the Lovebird tab, mail is organized by person, not just by conversation. Instead of just having the newest messages on top, you can sort people by who has been waiting the longest for a reply from you, or who you have not spoken to in the longest time.
Hopefully this will help remind you to keep in touch with the people you really care about, and reduce the time you spend being distracted by irrelevant time-wasters.
If you find bugs, please report them on GitHub: https://github.com/jonoxia/lovebird/issues
Thank you very much!