OCCT comes from "OverClock Checking Tool". Here is a list of its features :

32 Cores support
A sound file is now played when an error is detected
OCCT is much faster when stopping tests
TEST

RAM mode is now limited to 2GB and will take up to 90% of your total available memory
MONITORING

Core Temp Support
Sensor names are now displayed in the lists with Everest
Much better Everest support !
HARDWARE DETECTION

New CPU support (C2Q,...)
Vista64 support (you only need Administrative rights for it to work !)
INTERFACE

New option : "Sound" : sound file played when an error is detected
BUGFIXES

Graphs are now always generated when monitoring is configured
Temp and "My Document" path is now correctly detected (was failing in some cases)
TRADUCTION

Chinese support (traditional and simplified)
Esperanto support
Brazilian Portuguese support