Rukia's also used her shikai in the show. Her zanpukto has a pretty long name, so I can't remember it right now., but it is also ice-element like Hitsugaya's. It is said to be the most "beautiful ice element zanpukto in Soul Society." It seems very powerful, and its comman is "dance" I believe. What we saw her do with it was create a ring of ice around an enemy and engulf him in a piller of ice that shot up pretty high into the sky.
The name of Rukia's Zanpakuto is "Sode no Shirayuki" The name literally means the Sleeve of White Snow, referring to the Zanpakuto's color. It's pure white ,everything is, even the hilt and guard, you name it.

I should not spoil anything for the movie but I'll just say a little bit of it.
Spoiler:
Ichigo and Rukia encounter another Shinigami named Senna. She has a zanpakuto that is pretty much Wind element-ed. She seems to take a love interest in Ichigo and she remembers the day she's died. A group of Shinigami kidnap her in order to use a certain mechanism.


That is as far as I'll take with the Movie Spoiler. Aizen quite possibly has one of the most powerful Zanpakuto's or Shikai's in the series. Just by one mere look, you fall in his illusion for a very, very long period of time. You may even think you're fighting Aizen and you strike yourself causing massive damage to yourself, either fatal or not. I forgot its name but the translation is, "Mirror Flower, Water Moon" I think.

Vizards are very easy to explain. Shinigami who have illegaly gained hollow powers wile Arrancar are just vice-versa. They are on good terms with Ichigo, but seem cruel, especially Hiyori. Shinji is just funny. Ichigo has pretty much become one of the strongest "Shinigami" because of special training through Yoruichi and Urahara. Ichigo is technically a "Vizard."