ttyrpld is a multi-OS kernel-level TTY keylogger and screenlogger with (a)synchronous replay support. It runs on Linux, Solaris, FreeBSD, NetBSD and OpenBSD.
An IP Tracker for Mac OS X, Client and Server-side, very small! Logs your IP and the Date. If your Laptop is stolen you can log in via SSH, install a keylogger or something like this. Maybe a Windows or a linux version is coming soon..