The best alternatives to RevKit are Tabler, lstore.graphic, and Mockuuups. If these 3 options don't work for you, we've listed a few more alternatives below.
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Tanka— Tanka = Slack + Glean, built for fast-growing startups.
DesignRevision builds free and premium Bootstrap templates and themes, is publishing web design and UI and interaction design inspiration articles and features and reviews the best tools for visual creatives all around.
Skware you can pixelate any project you're working on in seconds... Amazing ways to use the icon pack: - Web, desktop or mobile apps - Social media, prints, banners - etc. What are you getting? - 100 pixelated icons - source files broken down pixel by pixel