One alternative is r/qtl (http://www.rqtl.org/). If you are familiar with R, it can be installed with the command install.packages("qtl") in R. You can have the input data in csv format (http://www.rqtl.org/sampledata/). There is a tutorial available for genetic map construction. (http://www.rqtl.org/tutorials/geneticmaps.pdf)
I would definitely recommend MultiPoint software, which includes three sub-packages: MultiPoint-basic, MultiPoint-ultradense, and MultiPoint-consensus.
Just updating here that Lep-MAP2 is no longer supported as my new software Lep-MAP3 (https://sourceforge.net/projects/lep-map3/) is superior to it in all aspects.