The language icon is an initiative to standardize language selection icon.
The Geotag Icon is intended as a web "standard" icon for identifying geotagged content to humans.
Feed Icon is a state standard for icon to identity syndicated content.
The Share Icon is becoming the standard visual representation for sharing content from any source to multiple destinations: over email, to bookmark or memetracker sites, to your friends on social networks, and more every day. Curently a trademark of Share This.
OPML Icon Project
OPML Icon is developed to point to Validated OPML for a new identity.
OPML (Outline Processor Markup Language) is an XML format for outlines. Originally developed by Radio UserLand as a native file format for an outliner application, it has since been adopted for other uses, the most common being to exchange lists of web feeds between web feed aggregators. (Wikipedia)
Open Share Icon Project
This icon is designed with community input to create a free, open, community driven alternative of share icon.