Settings…Media… Uncheck Organize my uploads into month- and year-based folders.
Members highly recommended for collaboration.
AWPCP for Classified Ads
iFrame. WordPress doesn’t allow iFrames for security reasons. This plugin supports iFrames which are necessary for embedding things such as a Google Form or PayPal buttons.
NextGen Gallary for simple photo management. Can be used to rotate through images. I use it to highlight VIP sponsors.