Multimedia
Gmail: Google Email
Web Conferencing
Getting Skype on an Android Smartphone
Website Browsing
Mozilla Firefox: Internet Browser
HTTPS Everywhere: Internet Browsing Encryption Extension
NoScript: Internet Browsing Script Safety Add-On
Website Creation
Setting up a Website with NearlyFreeSpeech (with Wordpress module)
https://github.com/openspeed/website-creation/wiki
WP-Filebase: Wordpress Versatile File Uploading Plugin
Project Presentation
Libreoffice: How to Add a Table of Contents
Standalone-Collaborative Project Presentation
Google Documents: Online Office Suite and Repository
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