WP-CRM is described as 'full-featured, customer relations management system seamlessly integrated into your WordPress site'. There are three alternatives to WP-CRM for a variety of platforms, including Android, Android Tablet, iPad, iPhone and Online / Web-based. The best alternative is vCita, which is free. Other great apps like WP-CRM are Zoho Bookings (Paid) and UpiCRM (Free, Open Source).
UpiCRM can interface and extend the most popular WordPress contact forms plugins, and provide a complete CRM solution. FEATURES Easily interface with and extend popular WordPress forms. A central customer relations management (CRM) solution for WordPress users.