Filtering MAME games

A complete MAME set is huge (more than 3.6 terabytes).

Some people prefer downloading only specific games to save hard disk space.

The criteria used to select what not to download (or delete) is a matter of personal choice. Some examples are:
 * non-arcade systems
 * games that are not working
 * clone games
 * games that require CHDs
 * games of specific categories (adult, gambling, Mahjong, quiz)
 * games that reguire specific input controls (49-way, trackball, light gun)
 * games in specific languages (Japanese, Chinese, Korean)
 * games with specific screen orientations (vertical, cocktail)
 * games with specific screen types (vector, LCD, dual screen)

Downloading the right archives according to any criteria is not easy because each game can be spread across different archives.

Below are some tools that help accomplish this task: