Yes, its theat Doku's RPG Texture Pack,
But I have edited the water, tree and grass textures to look nicer.

Since the texture uses a higher resolution, minecraft seems not
to toggle thoug the water frames.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html