There's a lot of data available out there and this page isn't going to cover a sliver of it. Are you looking for sample electrocardiogram data? Do you wish you could easily compare the lifespans of different species in one database? Send an email and we'll see what we can find.
General Life Sciences Data
Ecology & Evolutionary Biology Data
Resources for Neuroscience Data
Molecular Biology, Cell Biology & Biochemistry Data
Gene & Expression Data