Useful Links

Free Software!

Gimp Image editing software
Paint.net Image editing software
DeepSkyStacker Stack photos to reduce noise, as used in astrophotography.
StarTrails.exe Stack photos to reduce noise, as used in astrophotography.

Tutorials

Strobist Learn flash photography.
improvephotography.com Many useful pointers on improving your photography.

Miscellaneous

1x.com A very high quality photography website. Be inspired by the pros! Receive constructive feedback on your own images too.
dpreview.com If you are looking to buy a camera and need quality advice, look no further.