My top 4 Tactics resource

1.CT - Art 3.0 - Simply because of the function to play all the 1209 puzzles in a increasing difficulty way, the function needed for many softwares to upgrade to. This is why i prefer it over 4.0

2.Chess combination encyclopedia - It has tactics from all various parts of the game. The only flaw is structured tactics, which means there is no function to mix it up and to be harder because you than have to see which part to use solving. this way its just double attack and you search for double attack.

3.Chessimo - dont know much about it, was hoping you know little more, but has many units and lots of tactics, dont know the arragment of them, thought...

4.Chesstempo - same as above, lots of tactics, dont know the arragment and difficulty...

So what do you think and whats your top 4 list

1. Chess.com tactics on iPhone

2. ChessTempo

3. ChessEmrald

4. The book: Forcing Chess Moves

chessidea is a good one, too

Tactical Craps