Flowkit - Sketch library for user flows/content maps/annotations
Front-End Design Checklist - The design checklist for patient front-end developers 💎
Crystal: Sketch Mirror for Android - Crystal: Sketch Mirror for Android is an application that is designed for viewing your sketch designs in real-time, navigate prototypes and download content related to the sketches for offline viewing.
TryMason.com - Make front-end features, faster
Figma Mirror - Figma Mirror is an application that covers top trending designing or sketching ideas making your teamwork in a single environment and design better products from start to finish.
ContentIdeas.io - ContenIdeas.io is a 100% free content discovery tool that lets you find trending and high-performing content that's relevant to your niche by a simple search with keywords, domain, author or a combination of these.