RazorSQL

Query, update, navigate and manage databases from one database client. RazorSQL ships with a relational database engine that requires no configuration. Connect to other databases via either ODBC (Windows only) or JDBC. Run SQL scripts; visually edit, produce, alter, and view tables;
import and export data; build queries with the query builder; and browse database structures with the navigator.

It as well includes a tool to call stored procedures, a toolto compare tabledataand/or query results, query logging, and SQL templates for creating structures on several databases.
The SQL programming editor includes sustain for SQL, PL/SQL, TransactSQL, SQL PL, and Java and includes auto column completion, auto function/method lookup, syntax highlighting, key-ahead, multi-tabular display of queries, find/replace, find/replace in files, and bracket matching.

Add functionality with the plugin API.