If you have xposed framework installed then you can enjoy a near multiwindow experience or actually run it like split view of omni ROM.
Once installed the framework and having downloaded xhalo module you just have to adjust some setting.
Go to movable and resizable and enable that feature.
Then go to pop up settings and change values like that.
Then go into status bar mod and enable pin app
Here is how it should look if you do everything correctly
Sent from my GT-I8190 using xda app-developers app
Samsung Galaxy SIII Mini - GT- I8190
Recovery: [188.8.131.52] TWRP Maclaw's KitKat Mod version
ROM: [4.4.2] CyanogenMod 11 by MaclawStudio
Kernel : CM11 Included one [3.0.101] firstname.lastname@example.org
HTC Desire - Bravo GSM
[S-Off]: AlpharevX Alpha Release
Recovery: 4ext Recovery Touch
ROM: [4.3.1] Woh - Paranoid Android 3.99RC2 / Halo 2.0 enabled
Hboot: Stock Hboot
Kernel : [184.108.40.206]-evervolv-02114-g796d23a woh@AMILO-Si-2636 #1 ION Enabled