All I know about it is its YouTube descriptions:
Multiwindow on Aosp ROM (OmniRom) for mako
And:
Previewing OmniRoms MultiWindow feature, it’s not perfect yet obviously but already incredible useful – can’t wait to see final builds down the track.
This is more of a Split View than actual windows.
See the two videos after the break.
When is Google going to catch on that people want multiwindowing built into Android?
Previously here:
Another MultiWindow Android System
MultiWindow Android On The Cube U30GT2
MultiWindow Android: Forty Apps Tested Claim
First Review Of MultiWindow Android
MultiWindow Android Miracast
MultiWindow Android Beta Out For Chuwi V88
MultiWindow Android On A Larger Tablet
MultiWindow Android For ICOO Fatty 2
New MultiWindow Android Pimpery
Chinese iPad Mini Clone Notes #10
MultiWindow Android: Another Video
Rockchip Revises MultiWindow Android Logo
Another MultiWindow Android Demo Video
MultiWindow Android On A TV Stick!
Chinese iPad Mini Clone Notes #9
MultiWindow Android English Logo
MultiWindow Android: Latest News
MultiWindow Android Versus Windows 8
Vido Will Offer MultiWindow Android
More About MultiWindow Android
Rockchip’s MultiWindow Android Is Stunning And Better Than Samsung’s
Rockchip Bringing Windowing To Android