Activator - I use this to automatically enable LPM when a charger is connected or when I leave my house, holding Vol Up for Next Song/Vol Down for Prev. Song, Hold Vol Up & Down to Pause, Hold top-right of Status Bar for a custom App Drawer from any App
CCSupport - I mainly use this for putting something that should already be in the Control Center toggles, a damn location button!!
AppStore++ - Let’s you downgrade any app to any version you wish & block app updates
BetterCCXI - Make the CC Music Module display the Now Playing song/video Album Cover/Art without holding it down
ChromaHomebarX - Customize homebar color to your liking or do a RGB animation at what ever speed you prefer
Facebook/Messenger/Instagram/Twitter No Ads - Self Explanatory, and allows downloading pics/videos
DLEasy - Downloading of pics/video from even more apps
EvilScheme - A more powerful Default Apps picker
MYbloXX - A more powerful Ad Blocker than any App Store equivalent bc Apple doesn’t allow hosts file editing on stock iOS
Rose - Haptic Feedback on not just Keyboard, but almost anywhere of your choosing. For example, when I change songs or the volume I get haptic feedback.
Shortmoji - Replace prediction bar with sliding emoji drawer or Cut/Copy/Paste/etc functions or add either between the Emoji & Dictation buttons. Can even customize keyboard color or make it an animated RGB keyboard
This is just a few I can remember off the top, but there’s a whole lot more. A lot of iOS “features” originate in the Jailbreak scene. Screen recording functionality/code was in iOS 8 by Apple, but wasn’t introduced/enabled until iOS 11. JB Tweaks to do that existed before then.