During the past decade the mobile telephone has evolved into a magnificent device that allows its users to extend its capabilities through the installation of third party applications.

The vast range of platforms and the endless number of models set a problem for those who want to target the whole market or most of it. Developing separated versions of the same application for the different platforms and models is very expensive.

Developing a native application that includes a significant part developed using web technologies (also known as 'Hybrid Application') seems to be one of the most prominent alternatives.

In this lecture, I will overview some of the newest technologies relevant for hybrid applications development, including jQueryMobile, SenchaTouch and PhoneGap. In addition, I will overview their relevance in the context of Chrome OS platform and open source projects such as WordPress, Drupal and Elgg.