1. YouTube Enhancer: This userscript allows the users to enjoy a lot of options while watching a Youtube video and also let them download the video in different formats.
2. Remove Facebook Ads: This userscript removes all annoying sponsored links from the Facebook.
3. TinyUrl Decoder: This script shows the original links behind the shorten links.
4. Power Twitter: Add link shortener, photo uploader etc directly to the Twitter page and improve the usability of Twitter.
5. Rapidshare AutoWait: This script is an advanced automatic Rapidshare downloader.
If you have any other userscript which you find useful, let us know please.