EZ Database allows you to quickly and easily create your own databases right from your device, with no programming or SQL knowledge required. Keep track of any kind of data imaginable, using custom data structures that you define yourself.

Although EZ Database is designed to be simple for beginners, it also strives to offer the power necessary for advanced use cases. Seamlessly keep track of anything you need to keep track of, from address books and contacts, movie or book collections, weight loss progress, to do lists, you name it. Color coordinate and label your databases and tables for better organization. EZ Database also allows you to export your data tables to your filesystem in csv format.

EZ Database is a fully functional data organization application, but it is still in it's early stages, and updates will be made based on feedback from the users. Let me know in the app store comments or on the support forum what sort of features you would like to see added in the future, and I will see what I can do! This app is for you guys, so help me make it as good as it can possibly be!

KEXI is an open source visual database applications creator, a long-awaited competitor for programs like MS Access or Filemaker.

Features

• Full visual designers for tables, queries and forms. Queries can be also designed in dedicated SQL view.
• Running queries, support for parametrized queries.
• Data entry and sorting.
• Support for "Object" data allowing to store images of many types.
• Designing and displaying relational data using combo boxes (lookup columns).
• Advanced CSV data import and export from files. Copying to clipboard and pasting from clipboard is also available, thus the data can be easily transferred to applications like spreadsheets or word processors.
• User Mode, allowing to switch off all commands related to editing project's design (since 1.1.2)
• "Find" window for searching thought table and form's contents with rich set of options (since 1.1.3)

TOra is an open source database administration and sql tool for Oracle. With TOra you can perform virtually any administrative task on your Oracle database servers - anything from user and security management to server tuning. It's schema browser together with the sql editor is an ideal tool for both developers and database administrators. TOra handles multiple connections and it's advanced sql editor includes code completion and syntax highlighting - and for performance it displays your execution plan. A project that is a worthy competitor to the commercial products.

TOra is an open-source multi-platform database management GUI that supports accessing most of the common database platforms in use, including Oracle, MySQL, and PostgreSQL, as well as limited support for any target that can be accessed through Qt's ODBC support. TOra has been built for various Linux distributions, Mac OS X, MS Windows, and UNIX platforms.

In addition to regular query and data browsing functionality, it includes several additional tools useful for database administrators and developers -- which aims to help the DBA or developer of database application. Features PL/SQL debugger, SQL worksheet with syntax highlighting, DB browser and a comprehensive set of DBA tools.

PostgreSQL is a powerful, open source object-relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows.

It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP. It also supports storage of binary large objects, including pictures, sounds, or video. It has native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, ODBC, among others, and exceptional documentation.

Firebird is a relational database based on source code that Inprise (now Borland) release as open source. Many features from the ANSI SQL standard are included making Firebird easy to work with if you are experienced with SQL. Firebird database is stable and of production/enterprise quality, and has been widely deployed since 1981. It comes in two models: classic and super server.

The classic version is aimed for single user integration (perhaps embedded into applications) - where the super server version is the stand-alone edition that support multiple clients. Firebird is being very actively maintained by a large team of dedicated developers.