Zentro

Zentro is a project-centric SQL workspace that organizes queries by project and environment. Each project keeps its own connections, scripts, history, and editor tabs so you can focus on one service at a time. Switch Dev, UAT, and Prod environments instantly and connect to PostgreSQL, MySQL, SQL Server, and SQLite from the same app. It includes a multi-tab async editor with query cancel, schema-aware autocomplete, interactive ERDs, large CSV export, and credentials stored in your OS keychain. Free, open source, and cross-platform—no account or license required.