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Top 59 prototyping open source projects

Govuk Prototype Kit
Rapidly create HTML prototypes of GOV.UK services
Mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Odl
Operator Discretization Library https://odlgroup.github.io/odl/
Motorhead
A Rails Engine framework that helps safe and rapid feature prototyping
Baumeister
👷 The aim of this project is to help you to build your things. From Bootstrap themes over static websites to single page applications.
Handout
Turn Python scripts into handouts with Markdown and figures
Pencil
DEPRECATED: Multiplatform GUI Prototyping/Wireframing
Sketchize
Sketchize is built for UI/UX Designers to help them design lovely apps for mobile, tablet, and desktop devices.
Rbbjson
Flexible JSON traversal for rapid prototyping.
Recoil Design Tool
A design tool, built using Recoil.
Puzzle Publisher
A Sketch plugin that exports Sketch artboards into clickable HTML file and publishes it on an external site.
Testdrive
Quickly try out any Swift pod or framework in a playground
Guify
A simple GUI for inspecting and changing JavaScript variables
Gotcha
Turn your Framer prototype into its own live developer spec.
Reactype
🧪 Prototyping Tool for exporting React/Typescript Applications!
Ibanimatable
Design and prototype customized UI, interaction, navigation, transition and animation for App Store ready Apps in Interface Builder with IBAnimatable.
Wired Elements
Collection of custom elements that appear hand drawn. Great for wireframes or a fun look.
Bootstrap Xd
Bootstrap Design Template — Assets Library — for Adobe XD
Pela Blocks
3D printed, LEGO-compatible parametric rapid prototyping, robots and enclosures
Pencil
The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.
Sublimate
Sublimate: Ridiculously fast full stack Swift prototyping with Vapor and Sourcery.
Fake Auth
A fake auth service for prototyping authentication flows
Fast prototype
This is a machine learning framework that enables developers to iterate fast over different ML architecture designs.
Redmin
A super lightweight reddit client for iOS
Squib
A Ruby DSL for prototyping card games.
Puppy
Starter kit and delivery system for building static prototypes with Twig
Atmo
✔️ Mock data for your prototypes and demos. Remote deployments to Zeit now.
Mmock
Mmock is an HTTP mocking application for testing and fast prototyping
Vuse
🚧 Build web pages with Vuse, the next-gen interactive page builder powered with Vue.js.
Penpot
Penpot - The Open-Source design & prototyping platform
Charm
Charm: A Framework for Rapidly Prototyping Cryptosystems
Phonk
PHONK is a self-contained creative scripting toolbox for new and old Android Devices
Laravel Sketchpad
An innovative front-end environment for interactive Laravel development
Framer Inventory For Sketch
Semantic Import from Sketch to Framer
Dotnet Fake Json Server
Fake JSON Server is a Fake REST API that can be used as a Back End for prototyping or as a template for a CRUD Back End.
saas-starter
Everything you need to get your next Unicorn-For-X startup off the ground.
kdk fill it up
Use Fill It Up in WordPress to mass generate content & users.
prototyping-playbook
A winner's guide to prototyping in the browser
cvlab
CV Lab - Computer Vision Laboratory - a rapid prototyping tool for computer vision algorithms
ufw
A minimalist framework for rapid server side applications prototyping in C++ with dependency injection support.
chatengine
💬🛵 Engine to quickly prototype chat applications in javascript
vent
Vent is a light-weight platform built to automate network collection and analysis pipelines using a flexible set of popular open source tools and technologies. Vent is python-based, extensible, leverages docker containers, and provides both an API and CLI.
switchyard
Switchyard is a Python 3-based framework for building networked system software.
Scribble-Font
Scribble Font for Prototyping & Wireframing
framer-view-stack
A Framer module for creating views that stack on top of each other.
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