A free IDE for C#, VB.NET, & Boo projects on Microsoft's .NET platform
SharpDevelop is the open-source IDE for the .NET platform. Write applications in languages including C#, VB.NET, F#, IronPython and IronRuby, as well as target rich and reach: Windows Forms or WPF, as well as ASP.NET MVC and WCF. It starts from USB drives, supports read-only projects, comes with integrated unit and performance testing tools, Git, NuGet and a lot more features that make you productive as a developer.
Error Manager is a project designed for error feedback and managing errors in Dotnet softwares
LogViewer is a MS Windows .NET application that display logging datas. It's like the unix 'tail'. It can read a file or listenning over a TCP socket. Use regulars expressions to Hide, Rewrite, Colorize lines of log. Have a look at Screenshots section.