attendance clock/software

About
Software which records and manages data from digital attendance clock devices includes:
 * open-source:
 * TimeTrex (web site, SourceForge): uses PHP
 * Standard Edition is free to download; other editions cost annually per employee
 * Company also sells terminals
 * OrangeHRM (SourceForge): uses PHP, JavaScript, MySQL
 * proprietary:
 * PayClock
 * TimeWolf (web site)
 * TimeClock Plus (web site)
 * works with these terminals (see ../terminal)