Fishing Spider, genus Dolomedes. As their name implies, these large spiders inhabit mainly aquatic habitats and feed on other water-dwelling insects. They have even been witnessed eating small fish! This specimen, D. scriptus, was found around the perimeter of Little Bass Lake in northern Wisconsin.
Jumping spider (Salticidae: Tutelina elegans) from Iowa.
Mesh Web Weaver - family Dictynidae, probably genus Dictyna) from Iowa.