ScudCloud is a non official open-source desktop client app for Slack.
ScudCloud improves the Slack integration with desktop featuring:
- multiple teams support
- native system notifications
- count of unread direct mentions at launcher/sytray icon
- alert/wobbling on new messages
- optional tray notifications and "Close to Tray"
- follow your desktop activity and will stay online while you're logged in (if correct packages are installed)