Pulno - SEO Audit and Website Analysis. Pull up your SEO.
Product Hunt Leaderboard - The top products, hunter and makers.
LinkChecker - LinkChecker is a free, GPL licensed website validator.
Personal Hunt - Your personal Product Hunt leaderboard
BrokenLinkCheck - Free Broken Link Checker / Online Dead Link Checking Tool - find bad hyperlinks
Meta Hunt - Everything you ever wanted to know about Product Hunt