Foam sheets are used in making Crease Flies (talk with Lefty Ray), Guglers, and a host of other flies for freshwater. Need both the 1mm and 2mm or thicker sheets. My best find for thin sheets was at Ernie's in Houston. Watch out this spring when they offer the cheap flip-flop beach sandals. We buy these to make popping bugs.
Marking pens are used to color up the foam sheets or add color to other fly materials. I recommend Sharpies (cheapest sets) or the artist prefer the Prismacolor brand markers for more color choices (same you see in fly shops). After that any of the fabric marker pens often are pemanent for most materials. This site shows the options: http://www.dickblick.com/zz213/42/produ ... ig_id=1130
Balsa wood for traditional poppers. Also use the 1/4 square sticks to make bodkins with sewing neddles.
Jewelry making items such as the beads or the stainless tie-able wire cable for bite leaders. Most beads do not have large enough holes to work on the #4 or #2 size hooks so watch out for this factor.
Any of the super-glue products but perfer to purchase at Lowe's or Target for the Lock-Tite brands.
Fabric paints work well for adding eyes to deer hair bugs and other items.
Doll eyes can be used but many now prefer the glass eye found at the fly shops.
Mylar sheeting is hard to find but is used to make the spoon fly mention previously or putting around foam for larger poppers. Remember to epoxy afterwards to have a durable fly.
Hot Glue guns and glue. Can be used to make some of the crab patterns and other patterns using the new colored translucent glue sticks (often only seen at fly shops). The new metallic sticks for the mini-gun size are interesting and did one fly that landed my first flounder this fall.
For the most part, ignore their feathers as not the best for most patterns. Some of the fake furs can be used but I have not had great success with that product.
Chennile in the yarn goods works but not the best that I have found.
Head cements can be water based urethanes. But prefer clear nail polish such Sally's Hard-As-Nails. Plus nail polish does work well on the balsa poppers.
As you can see the list goes on. Just a bargin shopper on a mission some days.