Several days ago the paper CollapsABEL: an R library for detecting compound heterozygote alleles in genome-wide association studies was published in BMC Bioinformatics. Following this publication the GenABEL team is happy to announce the inclusion of CollapsABEL in the GenABEL suite.
(Please click on "read more", below, for more details.)
The main web page for CollapsABEL is http://www.genabel.org/packages/CollapsABEL, and the source code can be found in a repository on Github. Bugs can be reported in the associated bug tracker on Github and questions about this package can be asked on the forum.