Lupe, it's Rei's Minimap and it is allowed. As far as all mods Intangir allows, I don't really know.

i dont really encourage any but i understand some are pretty common and don't necessarily give you a major unfair advantage over other players so i don't ban for them

xray mods, and anything that actively makes you do impossible things, like mine behind your back, fly, kill people with forcefields.. those are all bannable (and more or less detectable and/or preventable)

Can you still fly while creating?

No

ohhh I see lots of pillaring in my future...