I would like to promote a Case Sensitivity Report tool written by Andrew Skiba.
This tool was written during work on a large porting project (3000 files) from ASP.NET to Linux.
When the project was run on Linux for the first time, a lot of files were found to be referenced in a bad case from other files. These included hard-coded filenames in the source code, images, xml, htc, js, xsl files, etc.
I know I did.