(Serial Ports on) Steroids enables users to execute remote C functions in a Python shell over a serial interface. It is useful for embedded system testing and industrial automation. It generates C code for the target and a Python script for the host automatically from a C header file.
AVRDUDE (AVR Downloader Uploader) is a program for downloading and uploading the on-chip memories of Atmel's AVR microcontrollers. It can program the Flash and EEPROM. Where supported by the serial programming protocol, it can program fuse and lock bits. AVRDUDE also supplies a direct instruction mode, allowing one to issue any programming instruction to the AVR chip regardless of whether AVRDUDE implements that specific feature of a particular chip.
BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides minimalist replacements for most of the utilities you usually find in GNU fileutils, shellutils, etc. The utilities in BusyBox generally have fewer options than their full-featured GNU cousins; however, the options that are included provide the expected functionality and behave very much like their GNU counterparts. BusyBox provides a fairly complete POSIX environment for any small or embedded system.