I think just about all my gear is now homemade:
down filled hammock
One of my synthetic quilts
Modified down quilt
3 ultralight packs
fleece jacket
beanie/ mittens
Gaiters
can stove
Silnylon tarp
Silnylon drybag
Mozzie net
Wool vest
Once you learn to sew a straight seam and gain confidence, you realise that just about all gear can be made simply (excuding baffled sleeping bags). Now I can make up a new pack for around AU$5, a simple hammock for $10 and a jacket for even less.
I did a trip a few days ago where for the 1st time, I relied solely on my homemade gear, and it was perfect for my needs. The great thing about being able to sew is, if something doesn't work the way you want it to, unstitch it and modify.