1. Rxvt is a color VT102 terminal emulator for the X Window System. Rxvt is intended to be an xterm replacement for users who don't need the more esoteric features of xterm, like Tektronix 4014 emulation, session logging and toolkit style configurability. Since it doesn't support those features, rxvt uses much less swap space than xterm uses. This is a significant advantage on a machine which is serving a large number of X sessions. The rxvt package should be installed on any machine which serves a large number of X sessions, if you'd like to improve that machine's performance. This version of rxvt can display Japanese, Chinese (Big5 and GuoBiao) and Korean. From Mandrake 9.0 RPM

2. VT102 terminal emulator for the X Window System Rxvt is an 8-bit clean, color xterm replacement that uses significantly less memory than a conventional xterm, mostly since it doesn't support toolkit configurability or Tek graphics, but also since features can be removed at compile-time to reflect your needs. The distribution also includes rclock, the smaller/better xclock replacement with appointment scheduling and xbiff functionality. From Debian 3.0r0 APT