JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You can use Webhooks, this link has more details about it: http://www.jotform.com/blog/85-Send-Instant-Submission-Notifications-with-Webhooks.
Here are some examples about custom codes that you may use: http://www.jotform.com/help/248-Webhook-Samples.
Also here is a similar topic discussed, you may take a look on it: http://www.jotform.com/answers/276737-We-want-to-send-a-SMS-to-our-Visitors-when-a-Form-is-Submitted-.