reverberation.c
DDoS with UDP Echo servers 
NATural_disaster.c
flood the NAT table with spoofed TCP SYN packets to break packet forwarding of NATing devices 
icb.c
places logical bombs in ELF binaries 
gool-alpha.tar
gool is a small library working with google. written in C for linux 
kidding.c
just for phun with HTTP PHP shells ;) 
sqlcmd.c
connect from linux to a MS SQL server and tries to spawn a shell via master..xp_cmdshell 'command'