Navicat Premium is a multi-connections Database Administration tool, allowing you to simultaneously connect to a single program MySQL, SQL Server, SQLite, Oracle and PostgreSQL databases, so that different types of database management easier.

Combines the functions of a member of its Navicat Navicat Premium, support for most MySQL, SQL Server, SQLite, Oracle and PostgreSQL features, including stored procedures, events, triggers, functions, views, and so on.

Navicat Premium enables you to easily and quickly transfer data between various database systems, or transmitted to a designated SQL format and encoding of a plain text file. Also, you can schedule batch jobs from different databases and run at a specified time. Other features include Import Wizard, Export Wizard, Query Builder, create reporting tools, data synchronization, backup, work plans, and more.

Navicat functional enough to meet all the needs of professional developers, but for the novice and the database server is fairly easy to learn.
 
PostgreSQL to Oracle Conversion Features
The tool migrates the following database objects and properties from PostgreSQL to Oracle:
Tables and Data
Converts columns definitions - data types, NOT NULL constraints
Converts integrity constraints - primary and foreign keys
Converts comments
Resolves reserved words and identifiers conflicts
Transfers data

Compatibility: OS X 10.6.6 or later

Home Page - http://www.navicat.com/products/navicat-premium