Extra! X-treme, a TN3270 client by Attachmate Host Explorer, a TN3270 client by OpenText (formerly Hummingbird) Personal Communications, PCOMM: a 3270 emulator and TN3270 client by IBM tn3270 X, a TN3270 emulator for Mac OS from Brown University Flynet Viewer, a web-based client by Flynet Host Access for the Cloud, a highly available, cloud deployed, web-based client by Micro Focus Inventu Viewer+, Fastest, Most Functional Web Terminal Emulator by Inventu TNZ emulator, a python 3.6+ library / emulator may interest you if you write software that automates 3270 terminal interactions or if you just use a 3270 terminal emulator. Terminal emulators