Recase
Recase is a tiny but handy folder and filename case-conversion tool
It allows you to equalize your filenaming and bring order in your directories! Right-click a file (or select a bunch), and then select one of the Recase options.
Easy to use folder- and filename case changer
Supports default, lower- and uppercase
Operates from the Windows Explorer context menu
Runs on Windows 95/98/ME/NT4/2000/2003/XP/Vista