Let me see...
1st photo: Chinese Evergreen and Arrowhead plant
2nd photo: Arrowhead plant, Draceana marginata and Peace Lily in the back
3rd photo: Corn plant
Someone will be along in a minute to give you the correct names.
4th photo: a really happy looking Phalaenopsis. I don't understand why you feel the need to repot. It looks great!
In fact, they all look great. If you've had them since last summer, you are doing very well. Keep it up.
