Confleo - Confleo is an all-in-one project management and CRM tool that allows you to create and manage multiple projects, assign multiple users within it, create stunning invoices for your clients and even accept payments from them through in-built payment g…

Papermind - Papermind Slack App is a collaborative article-editing and document management platform for Slack

Hassl - A really great project management app

Slenke - Project management & team collaboration

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.

Trainual + Slack Integration - Capture knowledge or access training right inside Slack