Adobe has acquired Nitobi, the creator of PhoneGap and PhoneGap Build. The annoucement was made at the company's Max 2011 conference in Los Angeles.

PhoneGap is an open source platform for building fast, cross-platform mobile applications with HTML5 and JavaScript. With PhoneGap, Adobe says it will offer developers the choice of two solutions for cross-platform development of native mobile apps, one using HTML5 and JavaScript with PhoneGap and the other using Adobe Flash with Adobe AIR. PhoneGap's open source framework has been downloaded more than 600,000 times to date and thousands of applications built using PhoneGap are available in mobile app stores that span devices based on Android, iOS, BlackBerry and other operating systems.

Nitobi is based in Vancouver, Canada and Nitobi's employees are expected to join Adobe. The acquisition is subject to certain closing conditions and is expected to close by the end of October 2011. Terms were not disclosed.

Adobe today also released its third public preview of Adobe Edge, the new HTML5 motion and interaction design tool that aims to bring Flash-like animation to websites and mobile apps using the latest capabilities of HTML, JavaScript and CSS. The new release contains interactivity features.

Adobe today released the new CSS3 Mobile Pack for Adobe Fireworks, which will enable designers to extract CSS3 from their design elements in Fireworks and add them to their HTML based websites and mobile applications.

At Max 2011, has also highlighted has co-authored with Microsoft and submitted to the W3C a proposal for CSS Regions, which enables "sophisticated magazine-like layouts" using Web standards. Adobe has also contributed a preliminary implementation of CSS Regions to the open source WebKit layout engine, which is already available in the latest builds of Chromium and the WebKit browser. Microsoft has made an implementation available in the latest preview release of Internet Explorer 10. In addition, Adobe today introduced a new proposal to the W3C, co-edited with other W3C members, called CSS Shaders that brings cinematic visual effects to HTML. Finally, Adobe announced that jQuery Mobile 1.0, a popular touch-optimized open source JavaScript framework to which Adobe is a leading contributor, was just made available as a Release Candidate (RC1) this week. Concurrent with this release will be a new version of ThemeRoller, which Adobe has rebuilt from the ground up to enable users to design custom jQuery user interface themes for tight integration in mobile Web projects.