ChkDB is rule-based data checking software for Oracle, plus files that define rule-sets and data domains (tables/views to be checked). The software is a PL/SQL package and some SQL scripts. There is currently no GUI front-end. For oil and gas data, there are domains and rulesets for well-header, drill-stem-test, and seismic-inventory data.
aiParts is a set of C++ classes that can be used to implement artificial intelligence, including classes that implement the HighHope technique. Sample programs include "find the shortest path" and "assign people and/or equipment to projects". A problem assembled from subclasses of the High-Hope classes knows how to solve itself by searching for a good solution.
deawk is a very simple double-entry bookkeeping system designed for self-employed people. It uses three (text) data files: transactions, a chart of accounts, and an optional vehicle log. Reports are generated by running bash scripts which run awk. deawk currently does not support depreciation of capital assets.