There is something fascinating about watching the time go by while watching a flip clock. We guess that's the reason why flip clocks have become so popular over the last few years. Here are a few different ones that we've spotted to give you that retro feel on your desk or your computer.

1. Retro Flip Down Clock
Chinavision's latest flip clock is available for $36! Having a real clock on your desk instead of running an app makes a lot of sense, since monitors need to be shutdown. [via Ufunk]

2. Desktop Flip Clock
This flip clock is different but costs $80. It would still look good on our desk.

3. Twemco Flip Clocks
Instead of spending a lot of money on designer flip clocks, the best option is probably to get a vintage one from Twemco, who has over 30 years experience making these clocks.

4. iPhone Flip Clock
While we don't recommend keeping your monitor, iPhone, or iPad on for hours at a time, these classic flip clock apps still look pretty good, no matter which version you are running.

5. The $1,200 Flip Clock
Well, this clock is still available, but it's still extremely overpriced for what it is. Still, it's interesting to look at, since it has a bunch of different fonts available for display.