@ajroach42 I don't think there is a good and concise write-up about #Searx. You're probably best served by trying out a few Searx instances and reading the short description on https://github.com/asciimoo/searx

There's also #Seeks https://beniz.github.io/seeks/ (last commit 2014) and #YaCy https://github.com/yacy/yacy_search_server (which isn't the best at finding what you're looking for). It appears that #Gigablast https://github.com/gigablast/open-source-search-engine now has a self-hostable FOSS version.