IRMouse is an USB mouse controlled by ir remote.. It receives packets from remote, decodes, and (if IR code matching) sends reports to PC via USB.. Reports are as in standard USB mouse (HID class device), so there is no need for additional programs/drivers on PC side, everything is done in IRMouse and system recognizes it as standard USB mouse.source

This device was designed to control standard hobby radio control servos via a PCs USB port.Standard RC servos need a power supply of between 4.8 and 6 volts. They also have a Pulse Width Modulation (PWM) signal input which controls the angle of the servo. This device supplies up to 6 such servos with a 5V supply and the PWM signal to control the servo. The combined load of your servos should not exceed 3 amps.source

This project is a tiny low-cost I2C bus adapter. It is meant to replace bit-banging adapters for the parallel port. Advantages are built-in power supply, less CPU load and a very low number of components. The image shows an example application with a DS1621 temperature sensor. The hardware of the i2c-tiny-usb interface consists of the Atmel AVR ATtiny45 CPU, a cheap and easy to obtain microcontroller with 4 KBytes flash (of which ~2k are used in this application) and 256 Bytes RAM. The processor is surrounded by few other parts.source

USB-LED-Fader can control up to 8 LEDs with individual brightness waveforms. Its command line tool can easily be integrated into scripts to implement a status display for computer load, mailbox status, network load, video recording software or similar background tasks. source

AVR-CDC is a USB-RS232C interface using the CDC (Communication Device Class) protocol. Although the bulk endpoint required for CDC is not allowed within the low-speed USB standard, it works fine on major platforms.This ingenious project implements the USB Communication Device Class, making use of the operating system’s driver for the device class. No separate driver is needed on the host! Although it goes somewhat beyond the USB specification, it works on all major operating systems.source