Good news! I've been writing both web applications and CLI scripts using PHP for years and I've always been a little bummed out that the only way I could share my apps was via the web. A month or so ago I ran across Gnope which is a group of developers creating GUI apps for Windows in PHP using the Gtk2 library. A couple of clicks later I had PHP installed on my XP and was able to create GUI standalones for the Windows environment from my Fedora workstation using all my open source program development packages like Glade. Right now the documentation for PHP-Gtk2 is almost non-existent but I highly recommend it for all you folks out there, like me, who have always dreamed of being able to develop user-friendly Windows apps without having to buy cost prohibitive M$ software development packages.
I too would like to consider sharing applications in a GUI form... Are you able to use EVERYTHING you have used to display on the web, but instead of interacting with HTML/JavaScript, you use their "language" to intereact with the GUI? Essentially... can you turn ANY app into a gui?
Yes. The library that is used is the Gimp Toolkit which provides the GUI interface. At Gnope you can download and install the basic infrastructure along with some demo apps that will whet your appetite and help get you started. Many of the scripts I created in the past use CURL and MySQL which were fairly simple to install and setup on my Windows box. Again, the answer is yes. I develop on a Fedora platform using Glade2 which facilitates creating the basic GUI objects (Glade2 is also available for Windows). I then wite signal handlers to perform the script functions. I haven't had any problem using any of the classes I created in the past. If you're at all familiar with writing command line PHP apps, you should have no problem creating user-friendly PHP GUI's.