EarTrumpet - Volume Control for Windows
Ushahidi - Ushahidi gathers data from various sources and reports incidences around the world in real time.
Sound Control - App-specific volume control
360social - 360social is a browser plugin that shows the social footprint of the people you want to connect with right inside your browser.
Power mixer - Power Mixer is a complete Windows volume control replacement.
AwesomeHunt - Community-curated lists of learning resources on any topic.