SeqFindr is a Python program that generates figures showing gene presence/absence. The tool was developed by my Beatson-lab colleague, Mitchell Stanton-Cook, and I have been also helping out with its development.

The program is still under development and is freely available here.

"SeqFindR CU fimbriae genes image. 110 *E. coli* strains were
investigated. Order is according to phylogenetic analysis. Black blocks
represent gene presence."