tools I use on a daily basis are -

FTK Imager
Helix


encase
netanalysis
IEF
Media Detective
WinHex
Windows File Analyzer
VFC (virtual forensic computing)
Live View
Mount image pro
VMWare Workstation

plus AV software to scan the systems for virus's which I always report on.

Alot of the software above will cost a bit.  If using in court then you really need to know what your doing, are you based in the US? UK? or OTHER?