Upgraded the original AS Activity Viewer 2008 to work with SQL Server 2012. This is based on a blog post I wrote back in February 2013 and subsequently re-publised in August 2013.

http://redphoenix.me/2013/08/22/upgrade-activity-viewer-2008-to-sql-server-2012/

Formatted KB and TIME based cells for ease of reading.
Ability to copy/save query as hard to read long queries in cells.
Tidied up UI and added cleaner icon


Link to the original Activity Viewer 2008.

https://asactivityviewer2008.codeplex.com/