Sudokuki is a graphical SUDOKU game. It solves even the most difficult sudoku grids for you. It can generate a sudoku, play sudoku, and print a sudoku.
Pyocr is a simple Python wrapper for OCR engines (Tesseract, Cuneiform, etc.). It supports Python 2.7 and Python 3.x, and requires Pillow.
A tool that adds color and bargraphs to the "free" command.
A Magento extension that makes all checkout steps appear together in a single page.