How CRM is Obtained?

After I took Megatrein Workshop in June of 2014 I decided to find out more about other CRM Systems besides Microsoft CRM System with I became familiar with thru that workshop.
CRM systems are available on premise and hosted.
Pricing is as low as 0.00 to 90 or more per user.
CRM can be priced based on different versions. Might have pricing based on storage or on plugins and add-ons.
Most popular CRM Systems are:

1. Sugar CRM https://www.sugarcrm.com/
2. Microsoft CRM https://dynamics.microsoft.com/en-us/
3. Salesforce https://www.salesforce.com/crm/
4. GoldMine https://www.goldmine.com/
5. Zoho CRM https://www.zoho.com/crm/
6. Insightly https://www.insightly.com/
7. SalesLogix https://www.infor.com/product-summary/cx/infor-crm/
8. NetSuite http://www.netsuite.com/portal/products/crm.shtml
9. Work ETC https://www.worketc.com/
10. Nimble  https://www.nimble.com/

Example of Streak CRM For Real Estate (KW agents) showed on Webinar Recording - Oct 2016, published on youtube.