Description: Adobe Acrobat Reader is a free software application for viewing, printing, signing, and annotating PDF documents. It is the standard PDF viewer and one of the most popular free software downloads with over 2 billion installations.
Type: software
Pricing: Free
Description: Makerbook is a free and open source web app that helps makers document their projects with instructions, photos, videos, files, and more. It allows makers to easily publish beautiful project documentation to share and showcase what they build.
Type: software
Pricing: Open Source