Vabotu - More than slack. More than Trello. FREE.
Patreon - Patreon enables fans to give ongoing support to their favorite creators.
Kurator - The premier Chrome extension for savvy researchers and publishers alike. Curate your interest and publish to your website, newsletter and social media sites directly from the browser.
Spotify Artists - Spotify's site for artists
Sensive - Design collaboration for everyone
Podfan - A membership platform for podcasts