vtiger CRM is an open source CRM business solution built over LAMP/WAMP (Linux/Windows, Apache, MySQL, and PHP) technologies and other open source projects. The core development team of vtiger CRM is based in Chennai, India, and is funded by AdventNet.

Features :-

1. Campaign Management
2. Mailing Lists
3. Business friendly User Interface
4. Front-end Migration to Smarty Template Engine
5. Operation Consolidation
6. vtiger Installation Program (Upgrade Manager)
7. Account Management
8. Contact Management
9. Calendaring
10. Recurring events
11. Group-based calendar
12. Reminders to participants
13. Product Customization
14. Add custom fields
15. Security Management
16. User Profiles
17. Groups
18. Roles
19. Record sharing model
20. Multi-group support
21. Communication Templates
22. Email Templates
23. Mail Merge Templates
24. Email Notifications
25. Add-ons
26. Microsoft Outlook Plug-in
27. Microsoft Office Plug-in
28. Thunderbird Extension
29. Help Desk
30. Ticket Management
31. Customer Self-service Portal
32. Knowledge base
33. Internationalization
34. Date & Time Support
35. Multiple Currencies Support
36. Reports
37. Inventory Management
38. Products
39. Price Books
40. Vendors
41. Sales Quotes
42. Order Management
43. Invoicing
44. RSS
45. Incoming E-mail Support

vtiger CRM includes sales force automation, customer support & service, marketing automation, inventory management, multiple database support, security management, product customization, calendaring, E-mail integration, add-ons (Outlook Plug-in, Office Plug-in, Thunderbird Extension, Customer Self-service Portal, and Web Forms), and others.