Dpreview
Reviews and forums on all things photographic!
http://www.dpreview.com/

Qimage
Qimage is our world renowned batch printing and processing software. 
http://www.ddisoftware.com/qimage/

Neatimage
Neat Image - best noise reduction for digital cameras and scanners
http://www.neatimage.com/

Adobe
Photoshop need we say more!
http://www.adobe.co.uk/

Pictures to Exe
Digital AV
http://www.wnsoft.com/
 

Audiograbber
Useful for adding music to pictures to exe
http://www.audiograbber.com-us.net/
 

Audacity
Useful for editing music/sound for pictures to exe
http://audacity.sourceforge.net/
 

JAlbum
Used in the slide show on our Members Gallery page
http://jalbum.net/

Photography Monthly
 Has a few hints and tips
http://www.photographymonthly.com/HomePM.aspx?page=1987

MICROQUIZ Ltd
35mm slide services
http://www.microquiz.net/

Clive Haynes FRPS. Clive's website is a mine of useful information and, in particular, many Photoshop tips and tutorials.

http://www.crhfoto.co.uk

Topaz Labs

Plug-ins for Photoshop

http://www.topazlabs.com/