1. OpenSSH

OpenSSH is a FREE version of the SSH connectivity tools that technical users of the Internet rely on. Users of telnet, rlogin, and ftp may not realize that their password is transmitted across the Internet ...

2. PuTTY

PuTTY is a client program for the SSH, Telnet and Rlogin network protocols.   These protocols are all used to run a remote session on a computer, over a network. PuTTY implements the client end of ...

3. Medusa

... PostgreSQL, rexec, rlogin, rsh, SMB, SMTP (AUTH/VRFY), SNMP, SSHv2, SVN, Telnet, VmAuthd, VNC It also includes a basic web form module and a generic wrapper module for external scripts. Visit Medusa! ...

4. THC-Hydra

... FTP, HTTP, HTTPS, HTTP-PROXY, SMB, SMBNT, MS-SQL, MYSQL, REXEC, RSH, RLOGIN, CVS, SNMP, SMTP-AUTH, SOCKS5, VNC, POP3, IMAP, NNTP, PCNFS, ICQ, SAP/R3, LDAP2, LDAP3, Postgres, Teamspeak, Cisco auth, ...