Here are some links to suppliers I use that you might find useful.
//IMatch, possibly the best image management tool in the world. It uses an infinitely powerful categorisation scheme with a portable database format underneath (so you can export data easily if you ever need to change). Its real power is in its scripting language, which allows you do to any task you can think of with your images - read and write IPTC or Exif data automatically, move, edit and categorise your images in arbitrarily complex ways. It's fab. It's cheap. It's written by a nice guy. Try it.
//IrfanView, a simple, lightweight and powerful image viewer. Without the bloat in software like ACDSee, this is a superb tool for a 'first look' view of your images. Can read the low-res preview in raw formats, allowing you to look quickly through your images immediately after taking them. Also contains powerful and swift batch rename and resize functions, great for creating low-res web images etc.
//Colour Confidence. Colour reproduction specialists for imaging professionals; purveyors of fine colour-accurate monitors and colour calibration products. Good kit, great service.
//Fixation UK. For those wallet-clenching moments when something's stopped working in horrible and expensive manner, these are the people to call. Unlike the Batcave, it's hidden in an industrial warehouse in central London, and can do same-day repairs at the in-house workshop. Excellent reputation with London-based professionals; reasonably priced for the excellent and knowledgeable service. Also a small but select range of second-hand pro kit.
//Gallery. Full-featured web-based image gallery software for people running their own website. Very flexible, very customisable, but badly documented. Hopefully this will change soon. Extremely actively maintained by a hard-working development community. Cost: FREE (donations welcome).