Send Enter key using the mouse I have to use the mouse a lot, but have to keep hitting enter as well. It would really help if I could use the mouse to send a global/system-level "enter" key event via triple click or something.

Why? Various programs and website forms I work with do not have a submit button to click, they rely on an "enter" keypress event. It's quite awkward to constantly move my hand from the mouse to the keyboard for one keypress every 20 seconds or so.

Is this possible?

EDIT

Not Virtual Keyboard or Mouse Keys.
Something like BetterTouchTool can be used for this purpose. You can configure gestures and actions that trigger keyboard shortcuts. You could trigger something that simulated the enter key being pressed using this tool.