Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Redmine - Flexible project management web application
Spreadsheet.com - Spreadsheets that come alive as applications
Mantis Bug Tracker - Mantis Bug Tracker is a free and open source, web-based bug tracking system.
Rows - The spreadsheet where teams work faster