Hi Concerned,
There are many opensource crm available....but sugarcrm is a good one among those.
It has independent architecture so you can use it for IT sector, mill sector, production sector, automobile sector, etc.
We have been implementing open source technologies for a while and have provided sugar CRM to 2 of our previous business partners.
Apart from CRM we can also implement open source HRM, Help desk, ERP, Data Center management, asset monitoring, server and network monitoring, billing system, Project management tool, Email marketing system, Cloud computing system, cloud management system, system automation, automated server installation, etc. All these tools are powerful tools available free of cost and developed by hundreds of developers worldwide.
After implementation we can also provide you customization on the desired technology like logo of your company, removal of open source links, custom themes, first time preperation, documentation, support and help, etc.
Please contact me on Skype (singh.rahul.1603), where we can discuss the project in more detail.
I shall provide you with demo installation / URL if required.
Looking forward to work with you.
Regards
Rahul
Skype -- singh.rahul.1603