Zencoder
Zencoder is the creator of an open-source HTML5 video player, Video.js, built with Javascript, HTML, and CSS. Video.js plays video via native playback in all HTML5 browsers and devices, or through Adobe Flash when HTML5 playback is not available.
GameMaker Studio
September 2011 sees the initial release of "GameMaker: HTML5" - a new version of software with capability to export games for web browsers alongside with desktop.