Are.na- An ad-free social network dedicated to creative research. Are.na allows users to upload and web-link "blocks" into different thematic "channels" to visually organize research and ideas. In addition to creating your own channel, you can browse other users' and collaborate. Sometimes described as a "vehicle for conscious Internet browsing," or "playlists, but for ideas."
Zotero- Traditional citation manager. Useful for creating automatic citations, and adding things on the open web to bibliographies.