Maximizer CRM is a second-tier CRM vendor, which would probably have been a lot more successful, had it not been so Canada-centric. Overall, it's a great CRM with very simple pricing - there's only one cloud plan at $49/user/mo billed annually. A self-hosted option is available, which is becoming more and more rare nowadays. Essentially, high price and the fact that you have to pay for email marketing and $5 per GB for extra online storage are the only serious disadvantages of the system. So, if you are looking for a free Maximizer CRM alternative that offers the same features, and is available both in cloud and on-premise, you'll find Bitrix24 a perfect fit.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.