Contra Wireframe Kit might be a bit more popular than UI Jar. We know about 1 link to it since March 2021 and only 1 link to UI Jar. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
UI Jar: This is one of the better ones for “general” category. Check it out yourself. It has some extensive filters. Source: 12 months ago
The design was heavily inspired by Contra UI kit design by Vijay Verma https://contrauikit.com/. Source: about 1 year ago
UI Movement - The best UI design inspiration, daily
Source Wireframe Kit - Library of 537 blocks for desktop and mobile prototyping
Design Hunt - Curated design inspiration for everyone
Platforma - Wireframe library of layouts and UI elements
Muzli - UI/UX and Design Inspiration Chrome Extension
Method Wireframe Kit - Find your method of being incredibly fast in prototyping.