Asana

Asana is a web and mobile application designed to help teams track their work. It was founded in 2008 by Facebook co-founder Dustin Moskovitz and ex-engineer Justin Rosenstein, who both worked on improving the productivity of employees at Facebook. 
Moskovitz and Rosenstein left Facebook in 2008 to start Asana (named after a Sanskrit word meaning “yoga pose”), which officially launched out of beta in November 2011. Some of Asana's high-profile clients include Airbnb, Dropbox, Disqus, Foursquare, MeUndies, ListenFirst Media, Pinterest, Stripe, Aimia, Zendesk, General Electric, Samsung, Harvard University, Tesla Motors, NASA, and Uber.
Asana is web-based software-as-a-service designed to improve team collaboration. It focuses on allowing users to manage projects and tasks online without the use of email.
Each team can create a workspace. Workspaces contain projects, and projects contain tasks. In each task, users can add notes, comments, attachments, and tags. Users can follow projects and tasks and, when the state of a project or task changes, followers get updates about the changes in their inboxes.
In May 2013, Asana launched Organizations, which enables companies to adopt Asana at enterprise scale. Organizations added an Asana Team Browser, a user dashboard, employee auto-join and IT administration abilities related to provisioning and permissions.
In January 2015, Asana released its native Android app.
In November 2017, Asana released the app in French and German.