A program originally written for the C= Amiga, which had a case-insensitive file system like the Apple Mac, it renames files to either upper, lower or title case (by first renaming to a temp name, then back to the revised one).
rencase [-l] [-m] [-u] [-v] [-f tmp] files...
-l convert all names to lower case
-m convert all names to mixed (initial caps) case
-u convert all names to upper case
-f specify temp name (default XrenXcase.tmp)