oraToolKit is the Swiss Army Knife for Oracle. Standards and well designed tools help DBA's mastering Oracle 10g / 11g throughout the whole lifecycle. OTK runs on Linux, zLinux, Solaris, AIX, HP-UX and other UNIX based systems.
GEBORA is an administrative tool for the Oracle Relational Database Management System. It's an OpenSource alternative to TOAD. Current version has syntax highlight, schema browser, pl/sql viewer and runner and many other features.