tsocks - transparent network access through a SOCKS 4 or 5 proxy
proxychains - proxy chains - redirect connections through proxy servers

socks4-clients - Socks4 enabled clients as rtelnet and rftp
socks4-server - SOCKS4 server for proxying IP-based services over a firewall

dante-server - SOCKS (v4 and v5) proxy daemon (danted)
dante-client - SOCKS wrapper for users behind a firewall