Mocha, by Brad Grier, is a CoCo 1/2 emulator written in Java that runs from a web browser.These emulators you can run directly from a web browser without needing to install anything: CoCo Keys2USB Kit - Kit includes custom PCB, micro-controller, and connectors to build an encoder for connecting TRS-80 Color Computer 3/2 keyboard to USB port.CoCo Joystick2USB Deluxe - An adapter to connect a TRS-80 Joystick (5/6-pin DIN) to a modern USB-capable computer.
