GitBook
Description: GitBook is an open source web-based platform for writing and hosting documentation and books with Markdown. It allows teams to collaboratively edit documentation in real time and publish formatted books.
Type: software
Pricing: Open Source
Nmap
Description: Nmap is an open source network discovery and security auditing tool. It is used to discover hosts and services on a network and to detect potential vulnerabilities.
Type: software
Pricing: Free