The Internet is a fun place, but we all know there are online scams, hacked sites and so on, and if you are worried about privacy and security, having a utility like Web of Trust (WOT) can come in handy. This browser add-on, available for Firefox, Chrome, IE, Safari and Opera, tells you which websites are the most trustworthy based on user experiences and ratings.
Clickberry Interactive Editor is a unique video editor that allows you to create interactive videos for Facebook, and extensions for Google Chrome and Firefox are available. In short, you just find the video, add an interactive feature, highlight it and upload to Facebook.
The All-in-One Sidebar (AiOS for short) is a free plugin for Firefox that lets you open several windows in the form of sidebar panels and switch among them. Created by Ingo Wennemaring it is a nice alternative to the standard add-on window for Firefox, and it also has many other functions.