If you are looking for an application for this, you may be confused and indecisive, but don't worry, we will share with you 7 of the most imponent open source terminal emulator programs available for multiple platforms (Windows, Mac, Linux etc.). Normally, a Windows user isn't familiar with the 'terminal emulator' term until he knows about the Unix world. Terminal emulators are extremely useful programs, that are not the same things as the command lines, but they act like that with a prettier interface (usually).