The simply the best collection of frameworks
jQuery Mobile is a HTML5 based user interface system designed to make responsive web sites and apps that are accessible on all smartphone, tablet and desktop devices.
An advanced responsive frontend framework. Customize your build using SASS to include/remove certain elements, as well as define the size of columns, colors, font size and more. Include plugins and get add-ons, templates and more.
Fully featured HTML Framework for building iOS and Android apps.
A set of small, responsive CSS modules that you can use in every web project. Crafted with mobile devices in mind. Responsive out of the box, so elements look great on all screen sizes. Customize your styles with the Skin Builder to make your style your own. Plays well with other libraries including Bootstrap and jQuery.
ProcessWire is a free PHP content management system and framework (open source CMS/CMF). It provides a powerful template system, an open source jQuery-inspired API and built-in user management. Lots of modules readily available.
Seed-PHP is a microframework that offers you a really simple way to implement powerful RESTful APIs or even simple web sites that could support pretty much all needed methods and responses in JSON or XML formats.
Luya is a scalable web framework and content management system. It provides an integrated deployment process that lets you publish your projects to different stages and servers. Needs composer and uses the Yii 2 PHP Framework.
UserFrosting is a PHP web framework that offers a complete toolbox of programmatic components for building your application and includes a fully functioning user management application.