This page has links to the latest and greatest software/firmware releases for Pixy. Previous releases can be found here.
PixyMon is the configuration utility for Pixy that runs on Windows, MacOS and Linux.
Pixy firmware is code that runs on Pixy itself.
Download the latest version 2.0.12 here, installation docs are here.
The Arduino libraries allow your Arduino sketches/programs to talk to Pixy.
LEGO blocks for Pixy allow you to use Pixy in your LEGO programs within the LEGO Mindstorms EV3 programming environment. You can download the latest version 0.1.1 here, docs are here.
Libpixyusb is a C/C++ library that allows your Linux-based controller (e.g. Raspberry Pi, BeagleBone) to talk to Pixy over USB.
The latest version is available through github), installation docs are here.