CustomError
TURN DEAD LINKS, 404s AND OTHER SITE ERRORS INTO GOOD TRAFFIC (& SET UP IIS ERROR PAGES EASILY). A ? page cannot be found' message on your site might as well be ? STOP? to your users. To get them back on track, CustomError for Microsoft IIS allows developers to add their own error pages (or... Customizing error pages becomes a normal part of site design and development -- providing a more integrated user experience and enhancing security by masking Web server-specific default error messages, an important part of defense-in-depth.
http://www.customerror.com/download/cesetup.exe - 1Mb - Download - Screenshot

.NET Obfuscator Dotfuscator
The . Net Obfuscator of Choice - Dotfuscator. * ISV's Choice for protecting products from reverse engineering. * Industry's choice to protect proprietary code from internal and external hacking. * Microsoft's Choice to ship inside Visual Studio 2005 in an introductory lite version. ... NET Code Development and Deployment * Complete support for . ... * Generated Map files allow you to interpret stack traces. ... Net Framework * Easy to use XML based configuration file. ... * Incremental Obfuscation * Includes GUI and command line interface suitable for integrating into build environments.
http://preemptive.com/downloads/RequestEvaluation.html - 16Mb - Download - Screenshot