Brimbox is a database system that was designed to bridge the gap between spreadsheets and custom databases. It is intended to be an alternative to Access and Filemaker. Although Brimbox has its own modular approach, it is customizable in the spirit of Wordpress, though it is a database interface and not a CMS.
Erudite is an application for training and testing back propogation neural networks using the ANNeML (Artifical Neural Network Markup Language) XML format. It supports testing and training neural nets with CSV files and has support for randomized training sets, optional adapting learning rate, sigmoid or hyperbolic tangent transfer functions, optional bias and weight adjustment locking, and more.
Rmollib is a library for manipulating molecules and systems of molecules stored in pdb, gro, and pdbz files. It gives you access to molecules on the atomic, molecular, or system level. The system can be edited in memory and then dumped to disk. It is meant for use with tool such as gromacs, Gaussian, and ToFeT. Rmoltools is a collection of command line tools that use Rmollib to manipulate and edit pdb and gro files. You may find them useful, but they principally serve as an example of how to use Rmollib.
WhiteDB is a fast, lightweight graph/N-tuples shared memory database library with a focus on speed, portability, and ease of use. There is no server process. Data is read and written directly from/to shared memory. No sockets are used between WhiteDB and the application program. It supports indexes (T-tree), persistence through logging and memory dumps, concurrency through locking, limited queries (conjunctive only), JSON, CSV and RDF support, Python bindings, command line utility tools, and JSON REST tools.