GNU usbsync is console-based utility that assists you in keeping files and entire directory trees synchronized between a portable storage volume (such as a USB flash or thumb drive) and arbitrarily many hosts. For this purpose, a special text file, usually named .usbsync, is placed in a storage volume's top-level directory to contain user-written synchronization entries.
Libpuppy is a library version of the puppy tool, which is used for accessing Topfield DVB tuners (and possibly others) via their USB port. Its main features are listing and retrieving contents of the HD in the device. It allows you to write your own utilities that interface with the device. It comes with two tools, puppy-dir and puppy-get, in addition to the original (mostly unmodified) puppy-tool.
g13 is a Linux-only library to interact with the Logitech G13 driver. This library provides several sublibraries including libg13, libg13mm, libg13-cairo, libg13-gtk, and libg13-gtkmm. These libraries provide functions and classes for browsing G13 devices through udev, setting the backlight color, establishing keymaps, and drawing on the G13 framebuffer device.
OpenSCB is a hardware and software solution for controlling servos over USB. The hardware is designed to interface with classic RC servos, AX-12/AX-18 servos, OpenServo, and more using a powerful 32-bit microcontroller with a USB port for programming and control with a PC. The schematic and layout will be available and can be customized. A graphical interface is also provided for your computer to configure, calibrate, and control the board.
usb4java is a Java library for accessing USB devices. It is based on the native libusb 1.0 library and uses Java NIO buffers for data exchange between libusb and Java. It also supports the javax-usb standard (JSR-80) through the usb4java-javax extension. Supported platforms are Linux (x86 32/64-bit, ARM 32-bit), OS X (x86 32/64-bit), and Windows (x86 32/64-bit). Other platforms may work as well (as long as they have at least Java 6 and are supported by libusb) by compiling the JNI library manually.
MaheshaBSD Server is a fully functional demo that never expires comes as a bootable USB image. Its purpose is to show Windows users the flexibility of running FreeBSD off a USB flash drive that works immediately as a server. The FTP server supports quotas; MaheshaBSD Server is the only pre-configured WordPress server that immediately runs everywhere. It is configurable via Webmin (remote web interface). The USB memory stick is writable; phpMyAdmin is also installed. The server can be redirected to any disk; NTFS partitions are also supported. By setting up IP forwarding on ports 21 (FTP), 22 (SSH), and 80 (HTTP), you will have the instant aibility to operate a public Internet FTP/WWW and WordPress server. Linux emulation is activated, allowing the use of many Linux tools. You can add unlimited number of accounts; however, in order to keep SFTP accounts chrooted, this needs some additional setup.