: Is there, or are there plans to start, a plugin and extension repository?
Strictly speaking, there is no reason why Solr Plugins would have to live in an Apache repository. if people write plugins that would be generally usefull to several people, and they wish to contribute them to Apache, they can be commited into the Solr repository -- but people could also host/distribute a plugin on some other site (sourceforge, etc...) however they see fit (using pretty much any license they see fit, i believe). If people start doing that, then we should definitely have anice wiki page for people to list those things. Note: there was another thread recently on solr-dev about adding a "contrib" section to the solr repository and bundling them in individual jars as an alternative to including them in the core solr.war... http://www.nabble.com/Solr-contrib-tf4517606.html#a12886773 -Hoss