I am always on the lookout for new IDE's I can use to do most of my web development work.  At the moment, my favourite is phpDesigner.  The sheer number of features included in the application make it easy for me to do my work.  This is closely followed by Netbeans and the Aptana.  Dreamweaver at the moment is rarely being used unless I need to update sites created with the the Adobe Developer Toolbox.

I recently came across PHPStorm and WebStorm from Jetbrains.  I have played with PHPStorm and I must say that I am very impressed.  Considering that this is still a work in progress, it certainly does show a lot of promise.  It is very light on resources and offers many features such as Zen Coding, Intellisense and GIT Support.

Both PHPStorm and WebStorm are cross platform applications and if you want to give either them a spin, head of over to the Jetbrains website.