The Windows Resource Kit binaries come to mind. They were distributed together in the same ZIP, but: 1. They used differing return values for success and failu

The Windows Resource Kit binaries come to mind. They were distributed together in the same ZIP, but: 1. They used differing return values for success and failures. Sometimes, a 0 was a success, sometimes 1 was a success, and sometimes only 4 was a failure, but everything else was a success. 2. They used different command-line switch formats. Some utilities used a hyphen, others used a forward slash.