Ravelry: Crochet butterfly pattern by Marie of Marie's Making. This is a great pattern! Works up well! I had tried several butterfly patterns and this was the only one that actually resembled a butterfly.
Crochet - Tutorial: "Crocheted jogless stripes" A common problem in amigurumi: you want to crochet something striped, but there's this funky looking stairstep "seam" running diagonally where you change colors.