SNAPE-pooled computes the probability distribution for the frequency of the minor allele in a certain population, at a certain position in the genome.
For more information, you can read the paper SNP calling by sequencing pooled samples (Raineri E, Ferretti L, Esteve-Codina A, Nevado B, Heath S, Pérez-Enciso M. , BMC Bioinformatics. 2012 Sep 20;13:239. doi: 10.1186/1471-2105-13-239) which explains the formulae used in it.
Also, have a look at the manual in .tex format.
To create the executable, type
make snape-pooled
The input format is SAMTOOLS' pileup and a typical incantation goes as follows:
./snape-pooled -nchr 10 -theta 0.001 -D 0.1 -fold folded \ -priortype informative < example.pileup