high-performance preforking PSGI/Plack web server

file non-deterministic information stripper — stand-alone tool

AnyEvent HTTP server for PSGI (like Thin)

tool to verify the links in a web page are still valid

command line access to Wikidata Query Service

syntax and minimal style checker for HTML

helper to find the first executable of a series of alternatives

command line tools for processing XML documents

run Zonemaster tests from the command line