| Program | Features | Runs On | Notes |
| Putty | Serial Telnet SSH | Windows Linux | Widely used free terminal program. |
| Kitty | Serial Telnet SSH | Windows | Improved version of Putty with more features |
| TeraTerm | Serial Telnet SSH Rlogin | Windows | Oldie but goldie. Works well on older systems too. |
| iTerm2 | same as MacOS (everything) | MacOS | Great for Mac users and completely free. Very fast and feature rich. |
| Qodem | Serial Telnet SSH Rlogin Socket | Unix, MacOS, Windows | Great open-source clone of Qmodem. Better than Qmodem |
| Eterm | Same as UNIX (everything) | Linux, BSD, Solaris, IRIX, AIX, Tru64, HPUX | Fancy Xterm emulator for Unix variants |
| Konsole | Unix variants | Unix running KDE environment | Full featured and free terminal emulation for KDE users and available on many operating systems |