Description: Calibre is a free and open-source e-book computer software application suite which runs on multiple platforms, allows users to manage e-book collections as well as create, edit, and read e-books. It supports a variety of e-book formats.
Type: software
Pricing: Free
Description: Circuit Builder is a free online tool for building and simulating electronic circuits. It allows users to easily create schematics with a drag-and-drop interface and analyze circuit behavior with built-in simulation features.
Type: software
Pricing: Freemium