AirDrive - USB keylogger, RS232 logger, Ethernet and Wi-Fi loggers
USB Mouse Jiggler - moves cursour to prevent the screen-saver & sleep.
Hardware keylogger - Wikipedia
Hardware Keylogger - KeyGrabber USB
AirDrive Forensic Keylogger Cable - USB Extension Cable Hardware Keylogger with WiFi and 16MB Flash : Buy Online at Best Price in KSA - Souq is now Amazon.sa: Electronics
Student Expelled for Using Hardware Keylogger to Hack School, Change Grades