Drastic Technologies' free TcCalc timecode calculator has been a part of Drastic's software since 1995.  It is also available as a free standalone utility for personal or corporate use.  The latest 4.0 release includes support for Windows 32/64, OS-X, Linux 64 and Google Android.  A previous version is also available for Windows 95/98/ME, NT and 2000.  TcCalc is also ideal in conjunction with Drastic's post and broadcast file previewer, HD-SDI player/recorder and Digital Disk Recorders.