Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
MySQL - The world's most popular open source database
Pennywise - Cross-platform application to open any website or media in a floating window
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Zercurity - Monitor your infrastructure for policy non-compliance, live
SQLite - SQLite Home Page