This unofficial SDK by Matthew Strawbridge is used for controlling BlinkStick devices connected to your computer via .Net and is for Windows.
This API is comprised of three main sections BlinkStickDotNet — an assembly (DLL) for communicating with your BlinkStick, BlinkStickDotNetTest — unit tests for the assembly, and BlinkStick — a console application for controlling your BlinkStick.
Some of the features of the BlinkStickDotNet API are: asynchronous blinking, brightness limit, Morse code, CPU monitor, memory monitor, and mouse-over colour changer.
The executable is readily available via the Downloads section.
BlinkStick is a smart LED controller with integrated USB firmware. It plugs into your computer and allows control the color of individually addressable or single color LEDs and LED strips and wide range programming language implementations give you the power to control the LEDs without the need to program a microcontroller.
It acts as a HID (Human Interface Device) and does not need any additional drivers. It uses ATTiny85 microcontroller with V-USB firmware.