Today, Microsoft announced "Visual Studio Community 2013" which will replace the Express version in the long term.
You can get it for free from
http://www.visualstudio.com/en-us/products/visual-studio-community-vs
The exciting part:
Q: Who can use Visual Studio Community?
A: Here’s how individual developers can use Visual Studio Community:Any individual developer can use Visual Studio Community to create their own free or paid apps.
Here’s how Visual Studio Community can be used in organizations:An unlimited number of users within an organization can use Visual Studio Community for the following scenarios: in a classroom learning environment, for academic research, or for contributing to open source projects.
For all other usage scenarios: In non-enterprise organizations, up to 5 users can use Visual Studio Community. In enterprise organizations (meaning those with >250 PCs or > $1MM in annual revenue), no use is permitted beyond the open source, academic research, and classroom learning environment scenarios described above.Q: How does Visual Studio Community 2013 compare to other Visual Studio editions?
A: Visual Studio Community 2013 includes all the great functionality of Visual Studio Professional 2013, designed and optimized for individual developers, students, open source contributors, and small teams.