Piwik is the obvious choice, and it blocks referrer spam by default and hosting can be subcontracted out of you don't want to deal with setting it up.

http://piwik.org/blog/2015/05/stopping-referrer-spam/

http://piwik.org/hosting/

+1 for Piwik.

It's better to have the raw data on your own server. I also like Piwik better than GA.