FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.
Panguin Tool by Barracuda Digital - See your website's Google organic visit data overlaid with Google's major algorithm updates and changes to easily identify the impact on your website. Technology by Barracuda Digital.
Really Good UX - A library of screenshots for UX inspiration
Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.
UX Recipe for iOS - Design checklist & estimation tool for your next UX project
SendView - The best way to track your competitors' email marketing.