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LeoFS is a highly scalable, fault-tolerant distributed file system for the Web. LeoCenter is LeoFS Web console in your browser. You can use it to easily operate LeoFS.

libdbi implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl. Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework.

This is a set of thin C++ wrappers for libgda v4 library.

This is a set of thin C++ wrappers for libgda v5 library.

ADOdb stands for Active Data Objects Data Base. ADOdb is a database abstraction library for PHP. The PHP version currently supports an amazing number of databases, thanks to the wonderful ADOdb community: MySQL, PostgreSQL, Interbase, Firebird, Informix, Oracle, MS SQL, Foxpro, Access, ADO, Sybase, FrontBase, DB2, SAP DB, SQLite, Netezza, LDAP, and generic ODBC, ODBTP. The Sybase, Informix, FrontBase and PostgreSQL, Netezza, LDAP, ODBTP drivers are community contributions.

JRobin is a 100% pure java implementation of RRDTool's functionality. It follows the same logic and uses the same data sources, archive types and definitions as RRDTool does. JRobin supports all standard operations on Round Robin Database (RRD) files: CREATE, UPDATE, FETCH, LAST, DUMP, XPORT and GRAPH. JRobin's API is made for those who are familiar with RRDTool's concepts and logic, but prefer to work with pure java. If you provide the same data to RRDTool and JRobin, you will get exactly the same results and graphs. JRobin is made from the scratch and it uses very limited portions of RRDTool's original source code. JRobin does not use native functions and libraries, has no Runtime.exec() calls and does not require RRDTool to be present. JRobin is distributed as a software library (jar files) and comes with full java source code (LGPL licence).

BBDB is a rolodex-like database program for GNU Emacs. BBDB stands for Insidious Big Brother Database, and is not, repeat, _not_ an obscure reference to the Buck Rogers TV series. Put the expression below into your ~/.emacs (require 'bbdb) (bbdb-initialize)

buzhug is a fast, pure-Python database engine, using a syntax that Python programmers should find very intuitive. The data is stored and accessed on disk (it is not an in-memory database); the implementation has been designed to make all operations, and especially selection, as fast as possible with an interpreted language. The database is implemented as a Python iterator, yielding objects whose attributes are the fields defined when the base is created ; therefore, requests can be expressed as list comprehensions or generator expressions, instead of SQL queries.

Cassandra is a highly scalable, eventually consistent, distributed, structured key-value store. Cassandra brings together the distributed systems technologies from Dynamo and the data model from Google's BigTable. Like Dynamo, Cassandra is eventually consistent. Like BigTable, Cassandra provides a ColumnFamily-based data model richer than typical key/value systems. Cassandra was open sourced by Facebook in 2008, where it was designed by one of the authors of Amazon's Dynamo. In a lot of ways you can think of Cassandra as Dynamo 2.0. Cassandra is in production use at Facebook but is still under heavy development.

Nice and very useful firebird database administration tool with many features.