Webpack
One of the most established and mature bundlers available today is webpack.
The following repository demonstrates the use of Webpack 5 along with Babel to use JavaScript ES6 with XLTS for AngularJS:
https://github.com/xlts-dev/angularjs-webpack-babel
Webpack can also be used with TypeScript.
Angular CLI
The following repository demonstrates the use of the Angular CLI with a hybrid TypeScript app that combines XLTS for AngularJS+Angular, Angular Material+XLTS for AngularJS Material, and the Angular CDK:
https://github.com/xlts-dev/angularjs-angular-hybrid-angular-cli
Other bundlers
A number of new bundlers have started to emerge in the last few years. One of those that has been getting a lot of attention is Vite. The following repository demonstrates the use of Vite along with XLTS for AngularJS and XLTS for AngularJS Material:
https://github.com/xlts-dev/angularjs-material-vite
Ionic Framework v1
Ionic is a popular development toolkit for building cross-platform native applications. Its 1.x version used AngularJS v1.5.x and was a popular choice for building hybrid mobile applications. If you specifically need to use Ionic Framework v1 with a supported version of AngularJS, the following repository demonstrates an updated Ionic v1 project that uses XLTS for AngularJS 1.5.x and XLTS for AngularJS Material 1.1.x:
https://github.com/xlts-dev/angularjs-ionic-v1
.NET Framework
.NET is a popular software development framework and ecosystem, designed and supported by Microsoft. It is used for building a lot of different types of applications, including web applications and web APIs.
The following repository demonstrates the use of XLTS for AngularJS and jQuery in an ASP.NET MVC 5 project using .NET Framework 4.8:
https://github.com/xlts-dev/angularjs-asp-net48-mvc5