PuTTY - Popular free terminal application. Mostly used as an SSH client.
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Synapse - Synapse is a semantic launcher written in Vala that you can use to start applications as well as find and access relevant documents and files by making use of the Zeitgeist engine.
iTerm2 - A terminal emulator for macOS that does amazing things.
DockbarX - DockbarX is a standalone dock that groups and launches applications.