Tutorial: Super Quick No-Elastic Knit Skirt! - Polka Dot Overload | Sewing, knitting vintage projects, tips, tutorials and cartoons!
Salsa skirt - very similar to the ruffled skirt. Suggestions: make the lining at least as long as the body of the skirt. If you've got a big booty, angle the body of the skirt so that it's 2-3 inches longer in back than in front. Consider adding extra (longer contrasting) ruffles to the lining so they'll peek out at the hem.
The Patternless Pleated Skirt--Includes written instructions and picture tutorial.