MySessions - MySessions is a simple session manager.
Vabotu - More than slack. More than Trello. FREE.
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Do - Do helps you run productive meetings. Do work you love.
Session Box - Using websites with multiple accounts at the same time is made easy.
Sensive - Design collaboration for everyone