Validation frameworks for .NET

• Microsoft Enterprise Library Validation Application Block
• EViL - Entity Validation Library
• CuttingEdge.Conditions

ASP.Net MVC View Engines

• Web Form
• Razor
• Spark
• NHaml
• String Template
• Wing Beats
• NDjango
• Bellevue
• Brail
• NVelocity

Logging Frameworks for .Net

• Microsoft Enterprise Library
  
• Log4net
  
• NLog
  
• Crypto Logger
  
• C# Logger
  
• CommonData
  
• CSharp Dot Net Logger
  
• Logger.NET
  
• LogThis
  
• logview4net
  
• NSpring
  
• ObjectGuy Framework
  
• SmartInspect
  
• Traffic Monitor
  
• SmartInspect