Letters (questions about rugmaking and answers)
Rugmaker's Exchange 

Articles about Rugmaking
Ways to Join Fabric Strips When Making Rag Rugs
Crocheted Rag Rug Patterns: How they work... and why some don't.
Rag Rugs--Square Footage Calculator
Advice: Making Money Making Rugs
Rugmaking Tips & Tricks
Novelty and Fad Rugs from the 20's to the 90's
Fads of the 20's, 30's and 40's: Inner-tube Rugs; Sewn Felt Rugs; Sewing Machine Yarn and Rag Rugs; Pieced Crochet Rugs; Rugs from Used Stockings
Fads of the 40's and 50's: Bobbin/Roll/Cylinder Stitch Rugs; Crocheted Loop Stitch Rugs; Girdle Rugs
Fads of the 60's and 70's: Macrame Rugs; Rope Rugs; Pieced Crochet Rugs; Pieced Carpet Remnants; Needlepoint on Rug Canvas
Fads of the 80's and 90's: Spool Knitting; Knitting Machine Rugs; Pieced Crochet Rugs with a Gimmick
 

Rag Rug History:
A Brief History of Rag Rugs
1932 Braided Rug Instructions
1885-1929 Various Rag Rug Instructions
1871 Rag Rugs Article 
1907 Rag Rugs Article
Rugweaving during the early settlement of Canada

Free Patterns & Instructions:
Creating a Floor Cloth, Four Ways From the traditonal techniques to the modern, directions for making a painted floor cloth.
Make a Wool Bed "Rugg" or Christmas Tree Skirt Use this old method to crochet together heavy woolens for a unique bed "rugg" or Christmas tree skirt.
Make a "Nettie Doll" with rug strip (and a tribute to an old-time rugmaker). This is a delightful quick project, with a history. 
Fun Braiding Projects with Cotton Strip (7/20/00) includes:
Make a 4-strand braided leash for a dog or cat (great kid's project); and 
Make a braided cotton placemat or tablerunner.
Crocheted Rag Heart Potholder, Hotpad or Basket, 
and Knitted Rag Heart Hotpad
6-strand ladder braid
Braided Rug instructions from 1932
Make a Prodded Rug
Make Your Own Rug Hook

(The following free instructions are contained in letters on the rag rugs tour. The link will take you to the particular tour stop, then scroll down to see the letters.)

Latch Hooking with Rags on Burlap
2-strand Rope Rug
Cotton Yarn Tufted Rug
Make a Floor Standing Braiding Clamp
Basics of 3-strand Braided-in Rugs
Strung Shag Rug, sewn variation
Strung Shag Rug, knitted variation
Making your own rug frame