Made for Gmail, to save you time, and keep you focused.
Coming soon on macOS, already on the web.
Completely free. Open source.
Juno is developed as an open-source application. All the source code is open and available to be read by anyone. You can start contributing right away, follow the instructions on the README.md file on the source code.
More information can be found in the Development docs here.
On its turn Juno is applying the great work of other people who create the dependencies to make it all run smoothly. The current version of Juno contains these dependencies.