Facebook and Twitter launched applications Thursday for Google glasses as developers rushed to learn more about tailoring software for the Internet-linked eyewear yet to hit the market. \"Built by Facebook, this app allows you to upload photos from Google Glass directly to your Facebook timeline,\" Erick Tseng, head of mobile products at the social network, said in a message posted from the Google developers conference. \"You can also add an optional photo description, just by speaking it.\" Tseng\'s Facebook page displayed an image evidently taken in a packed Glass session at the gathering and was tagged as the first public post to the social network using the application built for the eyewear. \"Can\'t wait to start seeing Google Glass photos in my News Feed!\" Tseng said. Globally popular one-to-many messaging service Twitter also introduced an application for Glass. Twitter for Google Glass let people share pictures or text messages using the glasses, according to engineering manager Shiv Ramamurthi. Ramamurthi demonstrated his point by tweeting an image from one of the array of sessions devoted to providing developers with insights and tools for making software for Glass. He gave the picture the hashtag #throughglass. \"In addition to sharing photos, you can also keep up with the people you follow on Twitter through notifications,\" Ramamurthi said. \"As always, you can reply to, retweet or favorite these Tweets.\" Several major news organizations have also tailored applications for Glass, which has only been made available to developers and a limited selection of \"explorers\" who paid $1,500 each for the eyewear.