* EPPlus for reading or creating Excel spreadsheets without using Excel (such as on a server). http://epplus.codeplex.com/
* RTFConverter for parsing RTF. http://www.codeproject.com/Articles/27431/Writing-Your-Own-R...
These are good enough to drive the decision to use C#/.NET for projects needing these capabilities.
They also have a great MVC integration
* EPPlus for reading or creating Excel spreadsheets without using Excel (such as on a server). http://epplus.codeplex.com/
* RTFConverter for parsing RTF. http://www.codeproject.com/Articles/27431/Writing-Your-Own-R...
These are good enough to drive the decision to use C#/.NET for projects needing these capabilities.