For the past 8 years, all Dev4Press plugins, themes and other projects were managed through the SVN repositories. And, now Dev4Press has switched to Git. Here is why, where and how.
WordPress Plugin Development Cookbook book is published by Packt Publishing and written by Yannick Lefebvre. Book contains 80 practical step-by-step problems with easy to follow solutions to most common problems developer can have when creating plugin for WordPress.
Headspace2 is great plugin for SEO. I prefer it much over other solutions like All-In-One SEO. But, problem with it is slow development and problems with WP3, unneeded features while missing features I need for my websites. So, I decided to work on my own version.