TOra is a database administration and development toolkit primarily for Oracle but also supporting MySQL, PostgreSQL, DB2, and Teradata. It provides a modular Qt-based GUI application with database connection management, SQL worksheet with syntax highlighting and execution, schema browser, result viewing/exporting, PL/SQL editor/debugger, tuning tools, backup utilities, and security/session management. The architecture follows a plugin/extension pattern where tools inherit from base classes, uses MVC for result display, and implements abstraction layers for database connectivity. Key entry points are in src/main/ for application startup, connection dialogs, and preferences.