Trac - Trac is a project management and bug/issue tracking system. Provides an interface to Subversion and an integrated wiki.
Free SEO Checker by Spotibo - An SEO checker that analyses based on Google's algorithm 👀
Bandcamp Artists - The Bandcamp app for artists and labels
Serpstat Website SEO Checker - Check your website's SEO, analyze competitors and keywords
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.