1. SquirrelMail is a standards-based webmail package written in PHP.

  2. Horde Groupware is a free, enterprise ready, browser based collaboration suite.

  3. SOGo is groupware server with a focus on scalability and open standards.

  4. RainLoop is a web based email client.

  5. Web-based IMAP email client

  6. Preview any link in a pop-up frame without leaving current page (instead of opening a new tab), eliminating the need to go back and forth to navigate to other links.

  7. Zoom images inline on the current page by holding the right mouse button and scrolling the mouse...

  8. Bookmark, Archive, Screenshot & Markup - All-In-One Web Collector, must-have research tool

  9. Free Online service to Download YouTube videos at one click! The best YouTube Downloader supporting fast and easy vimeo, Facebook and Dailymotion video Download and much more!

  10. Distill is a web monitoring tool. It can monitor RSS feeds, a webpage or a part of webpage. Alerts in the form of pop-up, audio or emails can be received.

  11. Violentmonkey is a userscript manager to support running userscripts in web pages.

  12. Everhelper - Eversync