Lucene-Relevance ( Contains implementations of good retrieval models (similarities) to use with Lucene/Solr: additional BM25L and BM25PLUS models to improve long document scores; tf-idf with Robertson’s tf formula; tf-idf with TF = 1+ln(1+ln(tf)) and pivoted document length normalization; and tf-idf with sublinear tf (ltc).

Lucene-SKOS ( An analyzer module for Apache Lucene 4.x and Solr 4.x, which takes existing SKOS concepts schemes and performs term expansion for given Lucene documents and/or queries.

PDFcropd ( Runs on the background to open newly downloaded PDFs automatically with the margins cropped suitable for printing.