BigContacts alternatives

BigContacts
Full featured: group calendar, tasks, email, files, photos, sales opporuntities. 100% Web Based. Work from anywhere, anytime. Mobile phone access. No syncing needed. Designed for organizations from 2 to 2,000 people. Sales Force Automation and Customer Relationship Management (CRM) tool.
BigContacts alternatives are:
Salesforce, Highrise, Zoho CRM