The following sites have images of actual stitches

[1] Sharon's Needlework Stitch Dictionary
http://home.iprimus.com.au/ijerry/sharonb/stitchdict/index.html

[2] Classic Stitches: Stitch Glossary & Charts
http://www.classicstitches.com/
You need to sign up to become a member (free). Then go to the "Stitching Zone," "Know How," "Stitch Glossary."

[3] Rissa's Pieces Stitch Dictionary

[4] Embroiderer's Workbook: The Heirloom Embroidery Collection
Ellen Moore Johnson
Instructions for basic stitches for heirloom embroidery using step-by-step photographs.

[5] ANG Stitch of the Month
American Needlework Guild stitch guide

[6] Ribbonsmyth's Silk Ribbon Embroidery Stitch Dictionary
http://www.ribbonsmyth.com/stitch_guides.htm

[7] Stitchguide.com
This link takes you to the cross-stitch guide. They also have guides for other forms of needlework.

[8] Better Homes and Gardens Cross-Stitch Basics
How to get started with cross-stitch plus some basic stitches.

[9] Needle Maid Designs
Learn a new stitch to add to your repertoire

[10] Over The Moon Designs
These are laid out in a nice table according to type of stitch.

[11] Jean Farish & Associates: Stitch Instructions
http://www.jeanfarish.com/stitch_instruction.htm

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Monthly Program

Stitch-a-Month
The Vintage Stitchers Chapter of EGA has a program available for purchase that allows stitchers to learn one new stitch each month. Stitch-a-Month (SAM) is packaged in units of 12 stitches (one for each of 12 months). Each year is devoted to a single stitch family.