I’ve released a couple of data-gathering and reporting gems: Sadie and Olsen. Sadie makes it easy to assemble data from various databases, network locations, files and other sources. It has some nice facilities for managing memory usage, session storage, and optimal and/or minimal execution. Olsen, a simple reporter, builds on Sadie to form a framework for reporting and analysis. It currently uses the TeX typesetting system to produce pdfs, but it is completely pluggable and can be easily extended to produce a number of different outputs.