DropBear : Small SSH2 Server and Client for a variety of POSIX-based platforms.

  Matt Johnston (see http://matt.ucc.asn.au/dropbear/dropbear.html)

PSPSSH : Porting on PSP

  Ludovic Jacomme (zx81.zx81@gmail.com)
PSPSSH hb-edition :

  Human-Behind (human-behind@hotmail.fr)
