The TVI (Taxonomy Views Integrator) module allows selective overriding of taxonomy terms and/or vocabulary with the view of your choice. Using TVI you can easily create custom views to output all terms in X vocabuarly.
The direct comparison of State Machine is to Workbench Moderation.
The main difference between State Machine and Workbench is that State Machine is extendable and exportable through plugins. Workbench is mainly administered through the user interface and is currently not exportable.
For developers, State Machine events and states can be defined through extending the base class. A basic workflow interface within Drupal's default revision architecture is provided by State Flow.
