Poly phred: http://droog.gs.washington.edu/polyphred/ It is an integrated program to identify heterozygous locations for SNP.
Poly Bayes: http://clavius.bc.edu/~marth/PolyBayes/ PolyBayes is a computer program for the automated analysis of SNP discovery in redundant DNA sequences.
QualitySNPng: https://www.bioinformatics.nl/QualitySNPng/ It is another software tool for detection of SNPs, designed in such a way that uses haplotype based scheme, it uses DNA sequences derived from next generation sequencing data. It performs on diploid as well as polyploidy species.
in Bioinformatics you can easily analyzed your SNPs predisposition in any disease. there are many prediction tools like SIFT, POLYPHEN2, SNP&GO, PHD-SNP, PANTHER, PROVEAN and much more thats can characterized the SNPs into normal or deleterious effect
There are several tools to detect SNPs and/or indel or CNVs on genes. You can use for example MAQ to Call SNPs but may also be used to align reads, VarScan to Identifies SNPs and indels but can be used with Roche/454 and Illumina reads, EBM to Identifies SNPs using an empirical Bayes mixture model and its implemented as R function, Syzygy to Detect SNPs and indels.