Well, Convekta's Chess Tactics for Beginners and CT-ART have alot of loyal customers. Personal Chess Trainer is another popular alternative. CTB focuses on 2-move combinations, CT-ART focuses on deeper combinations, PCT provides a mix... I like all three, and they each provide months or even years of value.
Chess Assistant is more like a chess database than training software. If you want a database, know that Chessbase is more popular and SCID is free.
does anyone has an idea about training software? I have looked the web and Found several like convekta(chess assistant, ct-art3.0...) chess academy....and others, do you have any input about this topic?