Features and options include:

Automatic, real-time memory monitoring and optimization
Fast, threaded memory freeing with stop option
AutoFree option intelligently optimizes RAM without sacrificing performance
system metric and performance monitors
Advanced tray support
Memory reporting and diagnostic logging
Simple, attractive interface
RAM-cuts (RAM-freeing Windows shortcuts)
Customizable Windows hotkey support
Access to Windows memory-related tweaks that could enhance system performance (new in 1.50)
Process memory usage reporting (new in 1.50)
Unique memory compression technology directly reduces applications' "working set" memory requirements instantly and without swap file usage: completely unlike other memory programs (new in 1.50)
More options and customizability