RetroShare helps you create a private, decentralized friends-to-friends network with encrypted communications, but how much does that increase security and privacy?

KDE's unofficial search engine may be the most usable choice of all. 

Calligra Suite goes beyond the standard four or five office suite programs by offering a range of applications for desktop and mobile computers.

You don’t always need a full-fledged YouTube or Flickr clone to share videos or images. Sometimes all you want is a quick place to upload, so you can link to your media or share it online. MediaCrush gives you just that, as well as some more interesting perks.

If you can use your desktop environment, then you can also write programs: All you need is your mouse, the Alice IDE, and some time to experiment.

Linux users didn’t need the recent NSA eavesdropping scandal to convince them that securing communication was a good idea. For years, free software developers have been creating secure tools that offer similar functionalities to all of those popular but very leaky services with ridiculous names.

When memorizing facts, learning, storing, and processing internalizes the subject matter. The Fresh Memory program offers various methods to help you anchor the facts in your memory.

With the right tools, you can create your own QR code squares with information you want to share on a business card, in a letter, or on your website.