i’ve been using zone tick for several years & really like the program. it runs in your task bar (um, yes, windows) and lets you have multiple time zones. i have nyc, london & melbourne in mine but you can customise with more. there’s also a world map, converter, calendar & more i haven’t played with much.

recently they sent out a promo where paid folks can offer their friends a fully functional version that runs til october 1st. if you’re interested in trying it, u can get it for the next few days (promo only runs til the 9th i think) but u can always download the trial version.