Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
allTags - allTags is a free, tag based file management application.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Tabbles - Tabbles use tags to organize and find files along with your colleagues.
Slack - A messaging app for teams who see through the Earth!