The INFLIBNET Centre has developed the CCF to MARC21 Conversion. We have been using this utility for our internal process for long time with our library management software.
Recently, the INFLIBNET Centre being one of the promotors of the open source software under the GNU licence, has decided to make this software free with source code for the community, especially for those who are using the CDS/ISIS software and the CCF bibliographic format for developing bibliographic database.
The software is available for download on http://sourceforge.net/projects/ccftomarcconver/ and the Project Home page of the CCF to MARC21 Converter page is http://ccftomarcconver.sourceforge.net/.
After some time you may also get this from the www.inflibnet.ac.in/downloads/ INFLIBNET page.
The programme is developed based on the article entitled "Mapping CCF to MARC21 An Experimental Approach" written by myself available at http://www.haworthpress.com/store/E-Text/View_EText.asp?a=4&fn=J104v33n01_05&i=1&s=J104&v=33.