Navicat Premium is a database administration tool that allows you to simultaneously connect to MySQL, MariaDB, SQL Server, Oracle, PostgreSQL, and SQLite databases from a single application. Navicat Premium combines functions of other Navicat products and supports most of the features used in modern database management systems, such as Stored Procedures, Events, Triggers, Functions, Views, etc.

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