Robert Muth

Spanish Verbs Pro

Free

Comprehensive Tool for Learning Spanish Verbs

English Verbs Pro

Paid

Comprehensive Language Learning with English Verbs Pro

Italian Verb Trainer Pro

Trial version

Enhance Your Italian Verb Skills

Hiragana/Katakana Drill Demo

Free

Comprehensive Tool for Learning Japanese Characters

English Verbs

Free

English Verbs: A Comprehensive Study Aid

German Verbs

Free

German Verbs: Essential Tool for Language Learners

Portuguese Verbs

Free

Portuguese Verbs: A Handy Study Aid for Learning Portuguese