Websites with games
to practice vocabulary, organized by topic:

http://www.gamequarium.com/spanishvocab.html

Link to practice with previous
Regents Proficiency Examinations:

http://www.nysedregents.org/testing/loteslp/slpspanish.html

Websites with vocabulary lists:

 If you are interested in purchasing
computer software to practice at home,
you might first browse what is available in bookstores such as Borders or Barnes and Noble. 
They have software, including the:

Oscar Lake http://www.multilingualbooks.com/oscar.html

To learn more about software
(tutorials, games, etc.) available for sale online: