[egor83]

Flattr and Gratipay work on this: repeatedly show support/gratitude to people (Gratipay is mostly oriented on software, Flattr is more broad).

https://flattr.com

https://gratipay.com

Then there's Patreon, but I don't immediately see any software-related stuff there, mostly other creative things (videos/music/drawings etc).

----------------------------

EDIT: a few examples from Flattr:

NoScript: https://flattr.com/thing/42724/NoScript

Open Street Map: https://flattr.com/profile/openstreetmap

EFF: https://flattr.com/profile/EFF

AdBlock: https://flattr.com/thing/118424/AdBlock-For-Chrome

WikiLeaks: https://flattr.com/profile/WikiLeaks

[psadri]

Thanks for the suggestions. I started contributing to gratipay recently.