open-cgf provides a 3GPP-compliant charging gateway function (CGF) as a sink for SGSN, GGSN, and other streamed CDRs on the 3GPP Ga/Gz interface using GTP' (GTP prime). Refer to 3GPP 32.295. These are common packet-switched data elements of GSM/UMTS mobile telephone networks. It aims to supply a telco-grade solution to this common, albeit very specialized, need. It does not decode the ASN.1 CDRs, but simply and reliably writes them to disk for later processing.
post_call is a small tool which is able to send a HTTP request to your AVM FritzBox 7050, which will then call a number you provide to post_call as a command-line parameter and using a interface (phone port number) you also provide as a command-line parameter. After FritzBox has called the number, your phone will ring when the person called is on the line. This can be useful if you want to integrate automatic calling from your electronic phonebook.
pyWebSMS is a program which lets you send SMS through the Internet without opening a Web browser. You can send multiple SMS, save your contacts, view the history, and much more. It's completely modular, so you can add or remove providers for sending SMS. You can make your own module for your provider if one doesn't exists yet by programming it in Python.