I did mention awesome, but it's so configurable I couldn't do it justice in a day (plus I don't really like it, partly because it's so configurable -- I prefer minimal WMs that stay out of my way).
On-topic, wmfs2 also has mouse-moveable splits and tabbed containers, and herbstluftwm has both manual tiling and automatic tiling modes. There are many WMs out there that might meet your requirements -- try a few!
Exactly. People like to point out that older window managers aren't in active development, as if this was a bad thing. To me it just means the WM is stable and doesn't need bug fixes.