Blackwork
Tarart designs produces a variety of blackwork and cross stitch designs plus a free blackwork christmas tree

Blackwork Embroidery Archives
Collection of original floral and geometric patterns to download. Includes historical notes on blackwork in renaissance costume, instructions for working double-running stitch, bibliography and links.

Blackwork Fill-in Patterns
Charted designs from sixteenth-century sources, with notes, at the Atlantian Embroiderers Guild (Society for Creative Anachronism).

Blackwork from Stitch On Line
History and techniques, early design sources, and bibliography, from the Skinner Sisters. Illustrated.

Blackwork Gallery
Annotated links to Renaissance portraits and paintings featuring blackwork, at the Elizabethan Practical Companion.

Blackwork: An Introduction
Survey article from Needle Pointers magazine XI:5, Winter 1983, by Carol Algie Higginbotham, EGA certified teacher of blackwork. Modern and traditional examples, bibliography, some free charts.

Bronwen's Blackwork Library
Contains charts for hundreds of authentic English, German, and Italian blackwork patterns from sixteenth and seventeenth century sources. Includes a tutorial on the double-running stitch.