W3C Validator guidehttps://github.com/tlvince/w3c-validator-guide
The W3C Validator guide provides a simple walk-through to build the W3C HTML validation service from its source.
Working with Tom [of onarray] has been a great experience.
He’s an awesome hacker with plenty of experience in sysadmin. His communication has been very responsive and friendly, and he got the mission accomplished really fast.
Jaime Iniesta, SiteValidator founder