I’m playing with a few WordPress plugins over on my Galleries Pages at the moment, as well as in the widget areas, so here’s a rundown of what I’m using to generate various displays/showcases/galleries:

• altPWA
  altPWA is a plugin that will allow you to easily embed a Picasa Web Album in your pages.
  Version 1.1.2 | By Radu Capan | Visit plugin site
• Flickr Gallery
  Use easy shortcodes to insert Flickr galleries and photos (and videos) in your blog.
  Version 1.3.0 | By Dan Coulter | Visit plugin site
• Flickrpress
  Display Flickr items in the sidebar. Supports Flickr RSS, photostream, multiple photosets, favorites, filtering by tag and displaying random photos.
  Version 0.3.2 | By Michael Tyson | Visit plugin site
• flickrRSS (this one is integrated into the Life Collage Hybrid theme for use in the Lifestream Page)
  Allows you to integrate the photos from a flickr rss feed into your site.
  Version 5.1 | By Dave Kellam and Stefano Verna | Visit plugin site
• jQuery Lightbox
  Used to overlay images on the current page. Original jQuery Lightbox by Balupton.
  Version 0.9 | By Pedro Lamas | Visit plugin site
• Lightbox Gallery (I haven’t got a demo page up for this one yet, although I’ve used it happily on other sites)
  Changes to the lightbox view in galleries.
  Version 0.6.1 | By Hiroaki Miyashita | Visit plugin site
• TubePress
  Displays gorgeous YouTube galleries in your posts, pages, and/or sidebar. Upgrade to TubePress Pro for more features!
  Version 1.8.7 | By Eric D. Hough | Visit plugin site

What else are people using that they recommend?