Slack - A messaging app for teams who see through the Earth!
Taiga - Project management platform for agile developers & designers
Confluence - Confluence is content collaboration software that changes how modern teams work
Plan.io - Planio makes web based project management and team collaboration more efficient and fun. It is the perfect platform for your projects, team members and clients.
Flock - A faster way for your team to communicate
TargetProcess - Agile Project Management Web Application