AdsCaptcha allows you to put CAPTCHA boxes for spam prevention, and also gain profit from it.
Content Slide allows you to create fully customizable jquery fading image slideshows anywhere within your WordPress site.
Travelmap helps you show your travels on a Google map in any post or page.
Meteor Slides makes it simple to manage slideshows with WordPress by adding a custom post type for slides.
Shorten2Ping sends status updates to Ping.fm everytime you publish a post, using your own domain, bit.ly, wp.me, su.pr, is.gd and others for shortened permalinks.
WPtouch automatically transforms your WordPress blog into an iPhone application-style theme, complete with ajax loading articles and effects, when viewed from an iPhone, iPod touch, Android, Opera Mini, Palm Pre, Samsung touch and BlackBerry Storm/Torch mobile devices.