Ettercap is a multipurpose sniffer/interceptor/logger for switched LAN.
It supports active and passive dissection of many protocols (even ciphered ones) and includes many feature for network and host analysis. Development has been moved to GitHub, https://github.com/Ettercap/ettercap
KISS is a kernel-side host-oriented security tool, which may bring you file integrity checking, file and process hiding and actions handling on special internal events (using a tiny scripting language).