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1. PerformanceMonitor PerformanceMonitor Public

   Free, open-source SQL Server and Postgres performance monitoring. Collectors, real-time alerts, graphical plan viewer, MCP server for AI analysis. Supports SQL 2016-2025, Azure SQL, AWS RDS, Postgr…

   C# 531 103

2. PerformanceStudio PerformanceStudio Public

   Free, open-source SQL Server execution plan analyzer — cross-platform GUI + CLI with 30 analysis rules, missing index detection, SSMS extension. Built-in MCP server for AI-assisted plan review.

   C# 250 40

3. DarlingData DarlingData Public

   Open source SQL Server troubleshooting: sp_PressureDetector, sp_QuickieStore, sp_HumanEvents, and other SQL Server scripts for performance troubleshooting

   TSQL 729 204

4. claude-plugins claude-plugins Public

   Claude Code plugins from Erik Darling Data

   TypeScript 32 6

5. amachanic/sp_whoisactive amachanic/sp_whoisactive Public

   sp_whoisactive

   TSQL 1.4k 344

6. BrentOzarULTD/SQL-Server-First-Responder-Kit BrentOzarULTD/SQL-Server-First-Responder-Kit Public

   sp_Blitz, sp_BlitzCache, sp_BlitzFirst, sp_BlitzIndex, and other SQL Server scripts for health checks and performance tuning.

   TSQL 3.9k 1.1k