Project After Effects → Motianic - Slideshow Creator - After Effects Project & Script (Videohive)

This is how you do it:
Load your chosen Music
Set the Cuts by tabbing your Marker-Key rhythmically at the desired times
You can correct any mistakes afterwards
Import your footage
Decide the order in which it should play
Choose the transitions
Define which transition should trigger where or let MOTIANIC choose at random
You can also edit the transitions
Insert Text as wanted
Run the script
Render the Slideshow

This is what you get:
MOTIANIC After Effects CS4 project file (Will work with Adobe After Effects CS4 and higher, no plug-ins needed)
PDF document with the controls explained
Friendly Support

These Transitions are included:
Fly-Through
Block-OUT
Cut
FormReveal
Freeze Frame
Turn
Block-IN
Trailer Swish
Mirrors
Parallax
Swipe
Liquid