Description: doPDF is a free PDF printer that allows you to convert documents from any Windows application to PDF files. It installs as a regular printer and allows you to print to PDF from any software.
Type: software
Description: Wolfram Alpha is a computational knowledge engine that allows users to get instant expert-level answers to questions on math, science, and many other topics by typing queries in plain language. It understands and computes answers across many domains.
Type: software