Visual Studio 2013 introduced the new Cloud Business App project template which enables developers to quickly build modern business applications that can integrate with and extend the Office 365 platform experience
Visual Studio LightSwitch is a development environment designed to simplify and shorten the development of businesses applications and data services. LightSwitch makes it easy to create data-centric business applications that can consume a variety of data sources and create clients that can run on a variety of devices. With LightSwitch you can:
- Build HTML5-based apps that run on all modern devices
- Consume and aggregate multiple data sources like databases, SharePoint and OData
- Eliminate plumbing code and focus on what makes your application unique
- Have flexible deployment and cloud hosting options including Azure and Office 365 Trust that your solution is built on best-of-breed technologies and practices
For more information read Understanding LightSwitch