The stfloats package provides:
– commands to control \baselineskip, that actually permit stretch and shrink, allowing a different value for use within floats;
– commands to control whether footnotes will appear above (as standard) or below a bottom float;
– a command that declares that double floats should be placed at the bottom (rather than the top) of a page.

The package is part of the sttools bundle.

The author is Sigitas Tolušis.