Tools for working with VCF files Formula was removed
Last versions were

Revision: 1

vcftools requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder
automake 1.16.1 Tool for generating GNU Standards-compliant Makefiles
pkg-config 0.29.2 Manage compile and link flags for libraries
zlib 1.2.11 General-purpose lossless data-compression library

Recent formula history

Shaun Jackman vcftools: migrate to homebrew/core (#6517)
Akito Tabira vcftools 0.1.15: fix installation path of perl modules
ilovezfs vcftools 0.1.15
Michka Popoff vcftools: fix audit
FX Coudert vcftools: import homebrew/dupes into core.

Formula code at GitHub