What do you mean by 'opening software' ?
- a software to help you learn openings ?
- a sofware to create/manage opening trees (ie. opening database) ?
- a good opening database ?
- an electronic version of a written opening encyclopaedia ?
What do you expect from it ?
what is the best opening software i heard chessmaster and fritz has an opening thing. what's the best opening software?
EDIT: Software to learn openings and study openings and to help memorize and maybe also an opening database.