Google has opened 750 glyphs in the icon package of the Material Design system. The system icon includes commonly used icons, such as for media play, communication, content editing, connection, etc. In web applications, both Android and iOS designs are applicable.
Icon formats include:
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)
Online browsing: http://google.github.io/material-design-icons/