The most affordable CRM system according to Capterra
...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. You too can contribute to it no matter if you are a professional programmer or software development is just your hobby.
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Testing versions:
GitStable: https://gitstable.yetiforce.com/
GitDeveloper: https://gitdeveloper.yetiforce.com/
VoiceOne gives you the ability to install and compleatly configure a pbx platform based on Asterisk 1.8 with an easy to use web GUI, which would be a framework to build a communication server adding various plugins.
This is a tray icon (c++) for windows which shows parked calls (or other state info) of the asterisk pbx. The sample server script (php) emulates a calling queue with the pbx call parking feature, so agents simply dial 701,702,.. to pickup incoming calls
Call accounting/billing software which uses SMDR facility of phone centrals. It uses a set of scripts for data(calls) aquisition/recording and preprocessing before import into a mysql database. The billing is done with PHP using a strong set of criterias