Packix repo is one of the must-have and best Cydia repo. If you have a jailbroken iPhone then you must add this repo. Because it has awesome tweaks and apps that are not available freely.
Packix Repository
This repo is developed by @packixrepo for IOS users. You can also add this to IOS 13. There are many third-party apps added by the developer.
Packix Repo Source

You can add this repo in Cydia by adding the source https://repo.packix.com/.
Here is guide how you can add Packix repo inĀ Cydia.
Packages
You can get following Packages form this repo.
- Activator
- AlertAni
- Autotouch
- Applications
- Emulator(Delta)
- Wallpapers
- Themes
- Keyboards
Also see ReProvision Repo and BigBoss Repo.