rSIGNAL - ruby Simple Inter-Interface Generic Aggregation Layer. It allows external data sources to be aggregated, store the aggregated data and print the aggregated data out in a transformed format to a file (or integrated HTTP server) on demand.
NDAD is the UK National Digital Archive of Datasets. This project contains the source code for the bespoke software which drives the public website and many aspects of the data curation/archiving process.