I laboured standing up for a while (leaning on DP during contractions), then I was sitting on a fitball with my legs apart rocking.
I gave birth standing up in the shower, bent over at the waist leaning on the shower rails. Midwife caught my son underneath me - she got a little wet
#1 DD was posterior, and I couldn't move from all fours. I ended up with an epidrual and assisted birth, so was not the perfect experience.