 BLAST ring image generator, BRIG, is a new desktop application that allows users to quickly and easily generate comparative genomic images from multiple prokaryotic genomes. It is designed to be intuitive and user-friendly, requiring no specialist computing skills. BRIG uses BLAST to compare each genome to a central reference sequence, generating a ring image showing the degree of similarity between the reference and other genomes. This image can then be annotated with various data points such as read coverage, assembly breakpoints and collapsed repeats. Additionally, BRIG can also map unassembled sequencing reads against the reference sequence, allowing for the visualization of unfinished or unassembled genomes. BRIG is available for free download and is compatible with Windows, Mac OS X and Linux operating systems. This article was authored by Pete Sunscott A., Ben Zakau and Noriel, Petty Nicola K., and others. We are article.tv, links in the description below.