Top 5 iOS 9 True Multitasking Jailbreak Cydia Tweaks List
Reachapp is a multitasking tweak where you use the Touch ID button to run 2 apps at the same time in split screen view
Quasar is for iPad only you can run more than 2 apps at the same time and also move around the app Windows.
Medusa is a new tweak that functions more like quasar but is new and had more features.
MirMir is a split screen multitasking tweak and functions as any other split screen multitasking tweak
Pegasus is probably the best multitasking tweak out of all these 5 tweaks.It very polished & had a range of features.
Other Multitasking Tweaks
Other Multitasking tweaks that are not listed are auxo,apex,multiflow,app heads also there are also many other multitasking tweaks available on the Cydia store.
Screenshots Of Top 5 True Multitasking Apps