Project IM-History is a fully open, all the source code plug-ins for IM-clients and other developments are distributed under a license GPLv3. At the moment, one active project developer - Mikhael Grigorev.
Download the source code plug-ins and programs for the different IM-clients you can from the site Google Code.
If you are an experienced developer and want to write a plug-in for IM-client for which you do not have one, be sure to contact us.
We kindly request to all developers and enthusiasts simply: Do not hesitate to send us back the modified code of your plug-ins. This will help us continue to improve the plug-ins.