Flowdock is a team collaboration tool for the web, desktop and mobile use. It is very user-friendly,boasts a better interface and has a really helpful team inbox feature.It allows the user to search content and tag people, as well as to manage multiple conversations in the least possible time. Some of the major features that are really helpful are that it allows you to see what the team is doing, you can even interfere and share your opinion over a particular topic, you can comment on the things, spark the conversations around the activities. For a team of 5 or less or any student may enroll for free,but a team over five has to register by paying $3 per user per month which may include features like unlimited flows, history, integrations, etc. There are many integrations available and you can choose from the best that suits your requirements which are Rally, Aha, Aseembla , Asana, Release, etc.