Welcome to Sleek Interactive
Having built the Aninoob 3D Animation Engine (Release date is coming soon!), I have vast knowledge of 3D in CSS As well as it's applications, limitations, innovations.
Creating a single application for all devices using responsive CSS is much more cost effective than creating multiple applications to accommodate all these devices. You can even animate the responsive CSS for a truly adaptive experience.
Custom CMS and LMS Solutions
Creating robust Content Management Systems (CMS) and Learning Management Systems (LMS) are things I have worked on extensively and have adapted to database frameworks that are complex, efficient machines.
Drag and Drop
I have created many Drag and Drop interfaces, Some are part of our custom CMS and LMS Solutions, others are custom Web applications. The Web is about usability! The more user-friendly an application is the more it will be used. Applications are becoming more and more intuitive and Drag and Drop is definitely a big part of this.