This emulator is pretty damn cool... I'm gonna break down the deets.
Atariage user raz0red was fooling around with them fancy computers and whatnot and got caught up in completing a very simple to use and amazingly approachable 7800 emulator that can be launched by clicking a single button.
Many homebrews titles
Homebrews in development
Some of the official 59 releases
Customizable cart lists
USB controller support (badazz)
A pause button
A mute button
Drag and drop ROM functionality
In depth high score tables
Emulator-wide leader boards updated in real time.
Emulation is never perfect, but its funkin' good here. You use the arrow keys on your keyboard to move around, and the Z and X keys for your left and right buttons. If you get the rom file of an obscure or new title, or something left out of the included game list, all you have to do is drag it into the "TV". This is a FANTASTIC way to experience exciting homebrews in development without waiting for a cart release. Be on the look out for me on the leader boards, my initials are VIN... see if you can beat some of my scores.
To play the emulator, click on the above image or click here.