Finding a can be tricky because many hardware manufacturers lock their software behind registration walls. Below are three trusted sources (always scan downloaded files with VirusTotal).
Write appears to work, but a standard reader shows garbage. Solution: Check the Coercivity setting. HiCo cards (3000-4000 Oe) need high power. Your free utility may default to LoCo. Also, verify your bit density (210 BPI for Track 2). magcard write read utility program free link