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vscode-solidity
Visual Studio Code language support extension for Solidity smart contracts in Ethereum https://marketplace.visualstudio.com/items?itemName=JuanBlanco.solidity
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ganache
Discontinued :warning: The Truffle Suite is being sunset. For information on ongoing support, migration options and FAQs, visit the Consensys blog. Thank you for all the support over the years.
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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.
Finally, you can fire up any IDE, time to code. I would recommend VSCode with the Solidity plugin.
Then, download Ganache from the Truffle website. This tool will allow you to setup a personal Ethereum blockchain that you can use to run and test your contract.