Ardamax 2.5>2.9 (3.0 if you can find a license)
Can not be found in task manager, although anyone with virus scan will find it
Can be password protected, sends logs to FTP/Email/Network
and can be appended into self extracting .zips (.exe) If you're distributing an "Awesome" addon i'd use that
Best easy to use/high powered Keylogger (log includes what program keys were sent to) and free, if you find a license key on google
Hope i helped.