ReAnimus Press - Breathing Life Into Great Books

Various tools for writers operated by the ReAnimus Press crew:

How To Improve Your Speculative Fiction Openings, by Robert Qualkinbush

In Search of Wonder, by Damon Knight

General:

Critique.org / Critters - The first writers workshop on the web. (Free.)
General Guidelines & Tips on Avoiding Scams
Fixing smart quotes in Word docs

Having Relationships With Characters on the Road to Great Fiction, by Andrew Burt

Staying Alive - A Writer

Footprints on Sand, by L. Sprague de Camp and Catherine Crook de Camp

More Issues at Hand, by James Blish (as William Atheling, Jr.)

Heinlein in Dimension, by Alexei Panshin

Heinlein

Galaxy Magazine: The Dark and the Light Years, by David L. Rosheim

SF in Dimension, by Alexei and Cory Panshin

The Craft of Writing Science Fiction that Sells, by Ben Bova

Modern Science Fiction, by Reginald Bretnor, ed.

The Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert Bloch

Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud Webster

The Issue at Hand, by James Blish (as William Atheling, Jr.)

Space Travel - A Science Fiction Writer