Multimedia

Operating System

How to Get Ubuntu on Mac OS X

Email

Web Conferencing

Getting Skype on an Android Smartphone

Project Management

Office Software Suite

Libreoffice: How to Add a Table of Contents

Computer Screen Capture

Shutter: Open Source Image Screen Capture Tool for Linux

Greenshot: Image Screen Capture Tool for Windows

Xvidcap: Video Capture Tool for Linux

CamStudio: Video Capture Tool for Windows

Graphics

Inkscape: Open Source Vector Graphics Editor

Audio

Audacity: Open Source Audio Recorder and Editor

Video

Cinelerra: Open Source Video Editor and Compositor

VLC Media Player: Multimedia Player

Electronics Design

KiCAD: Open Source Electronic Schematic and PCB Layout Design Suite

3D Model Design

Solidworks: 3D Parametric Modeler, Integrated 2D Drawer, Assembler and Analyzer

FreeCAD: Open Source

Mathematics

Sage

Other

Wally: Desktop Background Rotator

Web Browser: Mozilla Firefox

Internet Browsing Encryption Extension: HTTPS Everywhere

Internet Browsing Script Safety Add-On: NoScript