Terminator was originally written by Phil Norman, who produced a more-or-less usable replacement for rxvt on his own between 2004-04-21 and 2004-05-28; roughly a month of development time. Elliott Hughes took Phil's terminal emulation and used it as a base upon which he could experiment with advanced terminal emulator features and continues to actively develop Terminator. Martin Dorey ported Terminator to Cygwin, making Terminator one of the few terminal emulators available on Windows and Unix platforms.
Find - Terminator provides you with a find function so users can search for text and regular expressions within their terminal (including the scrollback) in the style of less, and offering quick movement to the next or previous match.
Horizontal Scrolling - Most terminal emulators wrap text when it intrudes upon the right margin. Terminator instead provides a horizontal scrollbar when necessary.
Multiple Tabs - Like tabbed browsing, only with terminals, tabbed terminals.
Number Reinterpretation - Terminator will recognize numbers in a variety of bases as the current selection, and add informational menu items to the pop-up menu showing the same number in other bases. No more manascii or resorting to bc.
Tab Character Handling - Many terminal emulators translate tab characters into strings of spaces. If a section of text is then copied or pasted from the terminal into a text editor, it appears as spaces rather than tabs; Terminator remembers them as tab characters.
Unlimited Scrollback - Terminator does not throw away output when it scrolls off the top of the screen, nor when it reaches any arbitrary limit. The user must manually clear the scrollback.
Intelligent Vertical Scrolling - Terminator's scrollbar won't keep jumping when there's output if you've deliberately scrolled back to look at part of the history, but as soon as you scroll back to the bottom again, it will resume auto-scrolling.
Safe Quit - Terminator knows when you still have processes running, and brings up a dialog rather than just letting those processes die.
UTF-8 - Terminator does not mangle accented characters, and it copes well with languages such as Greek where there's a mix of normal and wide glyphs.