ASL

Asl is an extension of Photoshop Style files. These files may be opened by Photoshop software.

1-Photoshop:

It is a style file that can be implemented to any layer or object in Photoshop. It may include bevel, drop shadow, color overlay, or border effects
There are different softwares that have similar features with Photoshop and you can get these free. 

2- Black Box: 

It is a software that can chase and save user and application movements. The log file that is saved by this software takes asl extension.

What to use ASL

Photoshop

which page related to ASL file

http://www.photoshop.com/

ASL Related Searches

You can check related links about ASL fileextension.