PkgBackup is described as 'backup application for jailbroken iPhones that backs up & restores all of your Cydia apps, your Cydia sources, and even your homescreen layout' and is an app in the Backup & Sync category. There are five alternatives to PkgBackup for iPhone, iPad, Mac, Windows and Linux. The best alternative is checkra1n, which is free. Other great apps like PkgBackup are AptBackup (Free), iSHSHit (Free), xBackup (Paid) and iFaith (Free).
xBackup is a simple app that will allow you to back up your Cydia sources and installed packages. So when you have to restore your device, you can get all your apps installed automatically, without having to install them individually from Cydia.
iFaith is a program that can save the SHSH blobs of the current version of iOS that's running on your jailbroken iPhone. It will work any version of iOS, whether or not that version is still signed by Apple.