sp_WhoIsActive is a comprehensive activity monitoring stored procedure that works for all versions of SQL Server from 2005 through 2019 and Azure SQL DB.

sp_WhoIsActive is now officially versioned and maintained here on GitHub.

The license is now GPLv3.

Documentation is still available at https://whoisactive.com/docs

If you have enhancements, please consider a PR instead of a fork. I would like to continue to maintain this project for the community.