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Framer - 🔥 Design real websites right on the canvas.
MainWP - A Free, Open-source, & Self-hosted one-stop solution to manage Unlimited WordPress websites from a single dashboard. MainWP is the only management plugin with 2000+ ⭐⭐⭐⭐⭐ reviews on WP.org
MontageJS - MontageJS framework is a platform to develop and create single page applications (which load single HTML page and dynamically update the app as the user puts in inputs or requests or interacts with the page.) with ease.
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Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.