Yes, both ScreenFlow and Droplr offer a Free Trial.
ScreenFlow is designed for Medium Business and Small Business.
Droplr is designed for Large Enterprises, Medium Business and Small Business.
Pricing for ScreenFlow Starts at $129 whereas for Droplr Starts at $2.99/User/Month when Billed Yearly.
Some top alternatives to ScreenFlow includes Create, VideoStudio Pro, Camtasia, Loom, Snagit, Vmaker, RecordCast, Filmage Screen and iMovie.
Some top alternatives to Droplr includes Scribe, CloudApp, ScreenshotsCloud, FireShot, Snagit, MockVisual, Awesome Screenshot, Snippyly and Clipt.