Elveos is described as 'was a crowdfunding website dedicated to free software' and is a Crowdfunding Service in the Online Services category. There are eight alternatives to Elveos, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and iPad. The best alternative is Liberapay, which is both free and Open Source. Other great sites and apps similar to Elveos are Patreon (Paid), Flattr (Paid), BountySource (Free, Open Source) and Tipeee (Free).
Flattr is a social micropayment service, that makes it easy for you to "flatter" things on the internet that you like. When you're registered to Flattr, you pay a small monthly fee of your own choosing.