* HTML, JS, CSS * Pure JS (ES6) * React * SASS (CSS Preprocessor) * NPM (Node Pakcage Manager) * Webpack:previous -> Parcel:current (Bundler) - Bundling JS, SASS (CSS) and other asset(font, image ...) files. - Live reload the app when file was changed. - Uglify the source code for product. * ELECTRON (App packager: V8 engine base) - File I/O to save & load the project and config file. - Communication with child process. - Resizable layout. - Directory tree. - Compile the code to hex file for upload to MCU. - Upload the hex file compiled to MCU. - Simply installer. - Auto update when version up.