The UCSC genome browser lets the user browse the human genome and selectively display many features such as SNP, SNP array probes, CNVs, alignments with other species and so on. What is unique is the display of custom tracks along with all the other information.
The UCSC (University of California Santa Cruz) bioinformatics webpage also offer other tools such as BLAT, In-Silico PCR and Gene Sorter.
