This free online intro video creator comes in handy for making quick intro or outro video clips to attach to videos that will be used for marketing or promotion of services or products. The free intro clips are of fairly low definition.
Creating higher quality video clips is very quick and easy, too.
The hd video clips that can be created at this site are reasonably priced.
Renderforest is a free online slideshow and animated video maker. Create slideshows, promotional and explainer business videos, logo animations and more.
On the subject of making Intro Videos, here are a couple other resources:
How to make a cool intro video whether it be for YouTube, or any other place you need an intro for.
Learn how to make an intro with Blender for free!