Geptop: A tool to find essential genes from genome sequence based on orthology and phylogeny.

Vgas: A viral genome annotation system by combing ab initio method and similarity-based method.

CasLocusAnno: A web-based server for annotating Cas loci and their corresponding (sub)types.



Anti-CRISPRdb: A comprehensive online resource for anti-CRISPR proteins.

CEG: A database containing clusters of essential genes.