Enterprise Search – Enterprise search doesn't mean mortgaging the farm:

"So before you decide you need to budget a half million dollars or more for search, consider what Walter Underwood, chief architect of Ultraseek and now search evangelist at Netflix once told me. Paraphrasing: “You can download Solr then spend a ton of money customizing it; or you can spend a ton of money licensing enterprise search software, then spend a ton of money installing and customizing it. Your call.”"