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BoatBuddy
An open-source boat display cockpit for navigation, speed, heading, and tide tables running on Raspberry Pi and accessible as a webapp through any smartphone.
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
I made real time bingo game with Django channels . If you want to see code then here's the source code : https://github.com/learningnoobi/django_channels_bingo_game
i made a navigation aide for my boat which uses channels to send speed, heading, location, and other data from a gps module to the front end. take a look and maybe it will inspire you