CleanMem - CleanMem keeps memory use in check on the system without the memory being pushed to the page file.
Tron Script - Tron is a glorified collection of batch files that automate the process of cleaning up Windows systems.
RAMRush - RAMRush is a free memory management and optimization tool.
NETGATE Registry Cleaner - NETGATE Registry Cleaner cleans and defragment your registry.
Mem Reduct - Mem Reduct is a small application that allows you to monitor and clean your computers memory.
Autoruns - See what programs are configured to startup automatically when your system boots and you login.