Timeless (US$0.99) for iOS is a heavy-duty timer and stopwatch app with some interesting features and a colorful, clean design (taking some inspiration from the upcoming release of iOS 7). Offering up to 10 simultaneous countdown timers / stopwatches, you'll have no problem keeping track of multiple, timed items to the second with Timeless.
Timeless has a simple and stylish interface with a variety of colored themes that can be applied to each timer, so it's easy to keep track of and identify unique timers from a glance. Furthermore, with a double-tap, timers can be labelled as required, like "bread in oven" or "coffee break."
To add a new timer, simply swipe to the left. To apply one of those unique colors, swipe up to reveal the theme settings menu and sample the styles until you find one you like and select it. If you can't find a color theme you like, there are additional theme packs available via in-app purchase ($0.99 - $2.99), which you can try before buying. Once you've selected your theme, swipe to the right to navigate back through your other timers.