GitHub reports: [edited]
Today, Google Design are open-sourcing 750 glyphs as part of the Material Design system icons pack. The system icons contain icons commonly used across different apps, such as icons used for media playback, communication, content editing, connectivity, and so on. They're equally useful when building for the web, Android or iOS.
What's included in the release?
SVG versions of all icons in both 24px and 48px flavours
SVG and CSS sprites of all icons
1x, 2x icons targeted at the Web (PNG)
1x, 2x, 3x icons targeted at iOS (PNG)
Hi-dpi versions of all icons (hdpi, mdpi, xhdpi, xxhdpi, xxxhdpi) (PNG)