Patreon - Patreon enables fans to give ongoing support to their favorite creators.
Cloud Patron - Open source Patreon alternative
Level Music - A new platform for independent artists, everywhere. In beta.
BackMyArt - BackMyArt is a paid membership community platform that helps Artists gain financel peace of mind to focus on their Art. BackMyArt is made Exclusively for Artists!"
Apple - Available on iOS
Liberapay - Liberapay is a recurrent donations platform.