I have a portfolio/gallery type plugin for sale on CodeCanyon, it's only $15. Here are some details:
1. Manage unlimited project types
2. 5 themes included
3. Capability for unlimited custom themes in css/themes directory
4. 3 different types of filters
5. Admin panel fancybox options with more to come in version 1.2.3
6. Show online/offline status of your projects or just turn status off.
7. Add a project to multiple types
8. Description pages in customizable fancybox
9. Smooth sliding effect for filtering through types
10. New version 1.2.3 coming with all new features.
11. Full portfolio management including project types, clients, online/offline status and more. 12. Add as many CSS styles as you like and change them in the settings panel of ProFolio. 13. 5 themes included for one click installation. 14. This plugin uses the Fancybox jQuery plugin (shows the projects description and direct links) for easy navigation and usability.