Download of summix-2.3.0-20150205.zip (summix-2.3.0-20150205.zip ( external link: SF.net): 206,064,048 bytes) will begin shortly. If not so, click link on the left.
Lucens (and Solr) based search engine with very flexible setup and workflow system. It supports incremental updates, hierarchical faceting and index lookup with low memory overhead.
Note: Although Summa is open source, the focus is on features used at Statsbiblioteket. No explicit resources has been allocated for support of external users.
