The ATR-42 (for FSX) by Virtualcol found at
http://www.fspilotshop.com for $11.90 (US Dollars). The ATR-42 and ATR-72 are my two favorite "commuter" turbo-prop aircraft. However, the VC and 2D cockpit are very basic and the graphics on some of the "pop-up" panels are very poor. But I do love the aircraft at any rate. Four(4) models are included... the 320, 320F, 500 and 600 and includes 37 different liveries.
Sorry, I know my screenshots aren't that good... but I wanted to share anyways