Lucene
Lucene is a free and open-source search engine software library.
https://lucene.apache.org/core/Top Websites
- data.gov
- kaltimprov.go.id
- data.gov.ma
- balikesir.bel.tr
- data.gov.il
- catalog.dnp.go.th
- forest.go.th
- data.gov.au
- mgcs.gov.on.ca
- cali.gov.co