Useful (and free) software

Stellarium free planetarium software.  Highly recommended and runs on multiple platforms.  Use this to find or identify objects in the night sky.

Cartes Du Ciel a slightly more advanced planetarium suite with downloadable object libraries.

Registax free image processing software used for stacking and aligning multiple images.

Deepskystacker free image processing and stacking software for Deep Space Objects (DSOs)

Virtual Moon Atlas free Moon atlas - learn your way around our nearest neighbour

Ascom drivers used for controlling your mount from a PC

PHD Guiding free mount control and guiding software for astrophotography

Sharpcap free camera capture tool