FAB SMS Addin for Microsoft Outlook 

Providing Text Messaging (SMS) capabilities for Microsoft Outlook. Utilise existing contacts, distribution lists, public folders and Windows address books. Simultaneously broadcast SMS messages to multiple recipients. Send vCard and vCalendar.
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SMSCOuntry XLbox 

SMS-XLbox seamlessly integrates with Microsoft® Excel® and enables you to send bulk SMS text messages to mobile phones across the world from your PC using Microsoft® Excel®. SMS text delivered in 182 countries across 489 networks.
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