Add ActivityWatch (#1087)

README.md

@@ -895,6 +895,7 @@ Any comments, suggestions? [Let us know!](https://github.com/jaywcjlove/awesome-
 #### Productivity
 
 * [1440 Minutes Left Today](https://1440app.com/) - Keep a track of how many minutes you have left until the day is over, right in your menu bar. ![Freeware][Freeware Icon] [![App Store][app-store Icon]](https://apps.apple.com/us/app/1440/id1483764819)
+* [ActivityWatch](https://activitywatch.net/) - Cross-platform, extensible, and privacy-focused time-tracker. [![Open-Source Software][OSS Icon]](https://github.com/ActivityWatch/activitywatch) ![Freeware][Freeware Icon]
 * [Alfred](https://www.alfredapp.com/) - Award-winning app which boosts efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac. [![Awesome List][awesome-list Icon]](https://github.com/learn-anything/alfred-workflows#readme)
 * [BetterMouse](https://better-mouse.com) - Smooth scroll, cursor acceleration prohibition, and powerful button/gesture remapping in one utility for 3rd-party mice. Aims for replacing those bulky and intrusive official drivers.
 * [BetterTouchTool](https://folivora.ai/) - Great, feature-packed app that allows you to configure many gestures for your Magic Mouse, Macbook Trackpad, Magic Trackpad and also Mouse Gestures for normal mice.