Twilio
SMS
Paid
Programmatically make and receive phone calls, send and receive text messages.
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Plivo
SMS
Paid
Platform that helps you program voice and SMS capabilities into your applications.
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Quackr
SMS
Free
Use and throw virtual phone numbers.
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Receive SMSs
SMS
Free
receive SMS and voice mail online.
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SMS Archives
SMS
Free
Search Engine for Text Message Marketers.
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Really Good Texts
SMS
Free
SMS marketing examples done right.
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