This is a total plug, but my company offers a self-hosted version of our CRM - it's called Sugester. You can check it out at http://sugester.com/crm if you're interesed or contact me directly via szymon at sugester.com.

I liked the simple CRM https://www.onepagecrm.com/ so much I started working for them after a few years of being a customer :)

CRM is a strange term. To track sales and comms with clients we’ve been using Close.io and it’s pretty sweet. We have LOTS of integrations around reporting and Slack notifications on top of it. Let me know if you want more info. @jokull on Twitter.

What do you think of Odoo? https://www.odoo.com/