If you're not a big fan of Apple Maps and would rather use Google Maps as your main maps app, MapsOpener essentially tells your iPhone to open anything map-related in Google Maps, including Siri commands, which is pretty cool.
If you're getting a little bored of the Notification Center's look and design, NCCards is a jailbreak tweak that gives the Notification Center an Apple Watch vibe when it comes to notifications and alerts, giving each one a cool card-like appearance on your iPhone.
The Collections tab in the Photos app can be useful, but some users simply don't use it and it can get in the way. This tweak simply gets rid of the Collections tab at the bottom and just shows the Albums tab.
If you hate iTunes, but still want to move music to and from your iPhone, PwnTunes is a jailbreak tweak that lets you do this without needing iTunes.
When clear out notifications in the Notification Center, you have to tap on the small X and then tap Clear to confirm, but OneTapClear is a tweak that simply allows you to tap only once on a notification to dismiss it.