Attachmate Reflection is described as 'A Windows-based family of terminal emulators that gives users anywhere, anytime access to IBM, UNIX, Linux, OpenVMS, HP, and X11 hosts from their desktops or mobile devices' and is an app in the OS & Utilities category. There are eight alternatives to Attachmate Reflection for Windows, Mac, Online / Web-based and Linux. The best alternative is ZOC. It's not free, so if you're looking for a free alternative, you could try x3270. Other great apps like Attachmate Reflection are z/Scope (Paid), Vista tn3270 (Paid), Microfocus Extra! (Paid) and Flynet Viewer Terminal Emulator (Paid).
Vista tn3270 is a Windows program designed to emulate IBM 3270 terminals connected to a host via IP link. If you are looking for an emulator created with mainframe programmers in mind, then give this one a try.
Inventu Enables Powerful Host Access Starting With Pure Web Inventu Viewer+ Terminal Emulation Which Enables Our Open Web ScreenAPI for Rapid Publishing and Integration Using RestFul JSON For 3270, 5250 or VTxxx, ANSI, Wyse, ViewPoint and XTERM Screen-based Applications.