OpenQueryStore (OQS) is a collection of scripts that add Query Store like functionality to pre-SQL Server 2016 Instances!
OQS is being built from the ground up to allow all versions and editions of SQL Server from 2005 up to and including 2014 to have a Query Store like functionality. The data collection, retention and cleanup will be easily configurable to allow for complete control of the OQS data storage.
The plan is to offer a fully integrated OQS functionality that requires minimal administration, including persistence of query data across restarts and backups/restores.
A further option will allow for a centralized query store, to collect all query statistics for an entire SQL Server instance.
Finally, a set of integrated reports inside SQL Server Management Studio will allow for analysis of the collected data.
For some more details, check out the Wiki
Currently supported 2008 - 2014