tesseract-ocr is an OCR engine originally developed by Hewlett Packard and now sponsored by Google. It is highly accurate and will read a binary, gray, or color image and output text.
BASH history suggest box is a command line utility which brings improved BASH command completion from the history. It aims to make completion easier to use and more efficient than Ctrl-r.
A disk usage utility.
A 2D CAD program.