Looks like progress on IEC at MatPLC a GPL PLC project with IEC as part of it. Maybe I will just help out there. A use this as a standalone W/GCC IEC compilier.
They are also want to use MODBUS, at which I have done a LOT of implementaions.
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!