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Deductive Database with Datalog, SQL, RA, TRC, DRC
The Datalog Educational System (DES) is a deductive database with Datalog, SQL, Relational Algebra, Tuple Relational Calculus and Domain Relational Calculus as query languages developed mainly for education. It can be used from most common Prolog interpreters over any supported OS and from portable executables (Windows, Linux and MacOS).
Redland is a set of object-based, modular and portable C RDF libraries providing RDF APIs for the graph, triple storage (librdf), RDF/XML parsing and serializing (Raptor), SPARQL RDF querying (Rasqal). Language APIs in Perl, PHP, Python, Ruby and others.
It is a set of tools to help database applications developers to handle database communication, reporting and printing. It has a solid, stable and easy to use API. It is also GUI toolkit agnostic and portable.
WebPython is a web-application development toolkit, written in Python. It contains a portable object-relational database layer, a Python-object persistence system and a templating engine, among other stuff.
Metakit is an efficient database library with a small footprint. It's a cross between flat-file, RDBMS, and OODBMS.
Keywords: structured storage, transacted, load on-demand, portable, C++, Python, Tcl, instant schema versioning.
YODA (Y Object Database Adapter) is OO objectstore for the Python. Actually, this isn\'t just another Python objectstore. YODA is complete run-time environment, where you can create you persistant objects, run the portable applications which uses those