TouchOSC - Modular OSC and MIDI control surface for iPhone / iPod Touch / iPad / Android
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Open Stage Control - Libre and modular OSC / MIDI controller
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Lemur - Lemur, the professional MIDI and OSC controller app that doesn't cut corners, has evolved.
iTerm2 - A terminal emulator for macOS that does amazing things.