http://philosopherswheel.com/questionnaire.htm
http://philosopherswheel.com/explainquestions.htm
you have to calculate your own results but there's a cool philosophy/mbti correlation chart at the bottom of the page. I know it's not socionics but I always thought it'd be an interesting way to discover philosophies and philosophers whose views might match up with your own. there's another version of the chart which correlates your results with enneagram types. I think there's even a section dedicated to finding correlations between astrology and typology.
more information (if you're interested):
http://philosopherswheel.com/mbti.html