CakePHP
Another paradigm in PHP. You may say a copycat of Rails but it is one of more interesting and light-weight way to program easier and faster.
CakePHP is just like Ruby on Rails but more.
We all learn from each other with a yard stick. CakePHP is easy and fast and it plugged obvious painstaking issues of ROR, Rails.
Instead of "rake", one can use "bake" and it works. It comes with primitive AJAX goodies.
The major difference is that for the first time, some of developers are heading back into PHP because PHP is ubiquitous and prevalent. Instead of having to living with spaghetti code. Here is a solid framework with best practices.
This translates to easier programming and faster project delivery with less growing pain, MVC.