Celtic Knot Bracelet, free crochet pattern by Jennifer E. Ryan: Links to a photo tutorial on weaving the knot.
2 ways to draw a celtic knot. The "old Fashioned" way and with Celtic knot font. Hmm. Going to have to play with this one.
3D Celtic Knots. Fold them in gold paper. Free print and cut plus tut: http://thepapercraftpost.blogspot.co.uk/2014/03/foldable-celtic-knot-embellishments.html
love these ideas
Celtic Knot - 1 - YouTube
Tutorials drawing and coloring
Tut on how to draw a celtic knot...cool!
celtic knotting applied to weaving tubes of fabric, (here, silk).
projects to try
Free Pattern for crochet celtic knot bracelet Celtic_knot_bracelet_full_photo_jeryan_small2
TUTORIAL Beaded Celtic Knots Part 2 Rings Rosettes & by gwenbeads
Ideas to make misc
Yarnplayer's Tatting Blog: Celtic knot shamrock
One of the better explained dot grid based Celtic Knot tutorials out there, complete with Walls. Good do's and don'ts.
Art: Knotwork - Celtic