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...It uses Gammu SMSD (part of gammu family) as SMS gateway engine to deliver and retrieve messages from your phone/modem.
Documentation is on the wiki: https://github.com/kalkun-sms/Kalkun/wiki
Development and source code can be found on github: https://github.com/kalkun-sms/Kalkun/
The most affordable CRM system according to Capterra
Are you looking for a system to boost your sales? Do you want to improve your relationships with customers? Do you want to contribute to the fastest growing open source project on GitHub?
You can use YetiForce completely free of charge. With YetiForce’s help you will manage 12 business processes in your company, no matter the size.
The vast number of features available for free helped us win the first place in Capterra’s “Most Affordable CRM Software” ranking.
YetiForce’s open source code was released under a very flexible and liberal license, which gathers a large and active community around the project. ...
...It features more than 18 tools, covering important functionalities (MI,statistics) and modules (acc,siptrace,drouting,dialplan) of OpenSIPS.
IMPORTANT: this is no longer the main hosting for the project. This was moved on GITHUB - https://github.com/OpenSIPS/opensips-cp .
The Esendex PHP SDK is now available via three distribution modes: Composer, PEAR and Gzip/Source Code on GitHub.
For more information: visit http://developers.esendex.com/SDKs/PHP-SDK