My favorites (which are very similar to everyone else's) are discussed here:
http://fishndave.blogspot.com/2010/1...-patterns.html

The keys for crappies are often bright colors (especially chartruese) or flashy (gold seems just a bit better than silver in my experience, but both are good). Also, the pattern needs good movement in the water, such as a marabou tail. Also, a slow but somewhat erratic (twitches) retrieve is almost always a winner.

In addition to the patterns listed in the blog, I've done well at times with the Myakka Minnow pattern:


And also with Ward Bean's Jointed Minnow:
(pattern here: http://www.warmwaterflytyer.com/patterns3.asp?page=32 )