Freeware SSH/Telnet Client

PuTTY is by far the most lightweight and handy SSH client available for free. A review of PuTTY has also been published.
Download PuTTY 0.62 (from SSH and Telnet Clients)

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Recommended SSH/Telnet Client | 444 KB | For Windows | Free

Tera Term (rarely TeraTerm) is an open-source, free, software implemented, terminal emulator (communications) program..
Download Tera Term 4.82 (from SSH and Telnet Clients)

10.92 MB | For Windows 7, Windows 8 / Vista / XP | Free

KiTTY is a SSH and Telnet client which was forked from the ever-so-popular PuTTY project. A review of KiTTY has also been published.
Download KiTTY 0.63.0.7 (from SSH and Telnet Clients)

client, kitty, network, password, putty, puttycyg, telnet, transaprency
1 MB | For Windows 7, Windows 8 / Vista / XP / NT | Free