Crackme 1: "dongle"-
GCC ELF 2.6 Linux x86 compiled binary (download)
MD5: 27e594768fc772effe91689c916ca763

GCC ELF 2.6 Linux PPC compiled binary (download)
MD5: 778a48b5faeb7465003ea49f20428f86

DevC++ MS Windows compiled binary (download)
MD5: 7566be58fccc32ac5a8e99eba684efce

Solution: