Tora

TOra (Toolkit For Oracle) is a Database Administration Tool for Oracle, MySQL and PostgreSQL

From the website:

Features

 * Handles multiple connections.
 * Asynchronus database communication. UI mostly responsive when accessing database.
 * Requires no installation on the database side to be fully functional.
 * Advanced SQL worksheet.
 * Code completion.
 * Explain execution plan.
 * Execution statistics.
 * SQL syntax highlighting.
 * Quick menu for often used custom SQL.
 * Parse error location indication.
 * Chart visualization of result.
 * PL/SQL block parsing.
 * Schema browser.
 * Table & view editing.
 * References & dependencies.
 * Tab & tree based browsing.
 * Object & data filtering.
 * PL/SQL editor & debugger.
 * Breakpoints.
 * Variable watches.
 * Line by line stepping.
 * Debugger SQL output viewing.
 * Syntax structure tree parsing.
 * Server tuning.
 * Server overview.
 * Tuning charts.
 * I/O by tablespace & file.
 * Performance indicators.
 * Raw server statistics.
 * Parameter editor (P-file editor).
 * Security manager.
 * Storage manager with object & extent viewer.
 * Session manager.
 * Rollback manager with snapshot too old detection.
 * SGA & long operations trace.
 * Current session information.
 * Statistics manager with parallel analysis.
 * DBMS alert tool.
 * Invalid object browser.
 * SQL output viewer.
 * Database & schema comparison and server.
 * Extract schema objects to SQL scripts.
 * Easily extendible.
 * Ability to add support for new or older Oracle versions without programming.
 * Well documented plugin API (Only Linux version).
 * SQL template help with PL/SQL functions and optimizer hints.
 * Full UNICODE support.
 * Printing of any list, text or chart.
 * Cross platform support. Known to work on Linux, Windows and Solaris.