What about soaringpilot?

Price: free
Reachable airports are highlighted on the moving map: yes
Final Glide Around Multiple Waypoints: yes
Calculates wind speed and direction while circling: yes
Wind speed and direction at several altitudes: not yet
Large Fonts (5 is best, 1 is worst): ~4
Differential Final Glide: yes
Turnpoint Area Task Support: ?
Special Use Airspace displayed on moving map: yes
Topographical Maps roads, lakes, etc.: no, but if needed could be added
as SUA
US Sectional Aeronautical Charts: no
In-flight optimization of OLC flights: no
FAI 28% Rule Turnpoint areas displayed in flight: no
Thermal Histogram: no
Tracks statistics for multiple tasks at once: no
Climb Maximizer: no

Supported Flight computers, loggers:

B50, C302, Colibri, EW, ReCo, B50&Colibri, IQue, Tasman

Some more features not mentioned in the table: thermal average, distance
done on task, avg speed, estimated time of arrival, elapsed time, speed
to flt, MC calc. etc-etc
Some screenshots can be found on my page:
http://bauerj.fw.hu/soarpilot
Regards,

/Janos