Here is the top ruby crm
-Fat Free CRM is open source Ruby on Rails-based customer relationship management platform. Out of the box it features group collaboration, campaign and lead management, contact lists, and opportunity tracking.
The project goal is to spur CRM innovation by providing clean code base that can be easily extended by developers.

-XLsuite is an application suite designed using Ruby on Rails that provides a full stack CRM and ERP system.
It is a simple matter to install your own suite and give it a try. There are many versions now depending on your needs, TribeXL is probably the most feature rich, although the blogshop, rustic photo gallery and adsense ones are all good as well depending on your needs

Related Stuff
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MooV: Using cutting edge Video phones and Software Video Phones - coupling all that with VoIP and empowering the disabled.
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Moo Telecom: VoIP communications made easy - Ring anyway with the fun and ease of using a normal phone
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TagR:Mobile Social Network with Real Time Locations Based services, and Ambience Intelligence, VoiP, IM, Skype, Googletalk, Mapping, Flickr, Events, Calendaring, Scheduling, SecondLife Support
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ClearSMS : ClearSMS is a Web-based application that lets you send bulk SMS messages to your customers, contacts, or just about anyone.
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Jajah:jah is a VoIP (Voice over IP) provider, founded by Austrians Roman Scharf and Daniel Mattes in 2005[1]. The Jajah headquarters are located in Mountain View, CA, USA, and Luxembourg. Jajah maintains a development centre in Israel.
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Skype: It’s free to download and free to call other people on Skype. Skype the number one voice over ip software
- PrivatePhone: a free local phone number with voicemail and messages you can check online or from any phone.

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