I am happy to announce the lib60870 library for the implementation of the IEC 60870-5 standards based protocols. At the moment the library implements most parts of the standard IEC 60870-6-104. The library is released under the terms of the GPLv3 open-source license. Commercial licenses with fair and simple license conditions are available on request. The library contains two different implementations. One is written in C99 compliant C code and is intended to be used in embedded systems. The other is written in C#. Please find the source-code in the download section.