AjaxSolr is an enhancement and at this point mostly a rewrite of SolrJS, an older JS library for Solr. My primary contribution adding much-needed features that were lacking in SolrJS, which allowed Evolving Web to use the library in several projects. I, unfortunately, had to stop work on the library because I returned to school that fall. James McKinney took over work on the library and at this point he has made some fairly large architectural changes so very little of the original library remains at this point.