x3270 is an IBM 3270 terminal emulator for the X Window System and Windows.

x3270 is an interactive X11 client, c3270 is a curses-based interactive client, and s3270 and tcl3270 are scripting tools for writing screen-scraping applications. wc3270 is the Windows console client and ws3270 is the Windows screen-scraping tool. Includes IND$FILE support, DBCS, and more.

x3270 runs over a TELNET connection, emulating either an IBM 3279 (color) or 3278 (monochrome). It supports:

The full TN3270E protocol
SSL/TLS (via the OpenSSL library) for encrypted sessions
APL2 characters
Non-English character sets, including Russian, Turkish, Hebrew and DBCS Chinese and Japanese
IND$FILE file transfer
NVT mode (emulating a color xterm)
A pop-up keypad for 3270-specific keys
A scrollbar
Printer session integration
Extensive debugging and scripting facilities