Shareware programs are those where you pay the author if you find the program useful. Payment information is usually found when you start up the program. Freeware programs are freely copiable. Various grammar exercises. Cloze with a grammar focus.
Various grammar exercises in a whole-text deletion format.
Quizzes with a grammar focus. Demo version of a shareware program that offers practice with regular and irregular verb tenses. The demo is a fully functional version of the program, but can only be used 25 times before it locks.