Commercial chess software
1. Fritz - One of the strongest, most complete chess programs out there. It is currently on version 8, and it seems to be the de facto standard for computer chess engines. The best feature of the program, in my opinion, is the annotation. People frequently call this feature "annofritzing". :)

2. Chessbase - a chess database application. It offers the same features as Scid does, only in a visually more pleasing way.

Both Fritz and Chessbase, along with a lot of other chess software, are available in the Chessbase store.

3. CT-ART 3.0 - a very good tactical trainer. Although the Elo values it assigns do not seem to reflect reality, making your way through th 1000+ tactical exercises is bound to increase your chess muscles. One of the funniest features it has is when, after asking you to deliver mate with white, it reverses the board, and asks you to find a win, from the same position, for black this time! Available at Convekta.

4. Chess Mentor. A unique trainer. It has a lot of modules, each covering different aspects of the game. Has very good explanations. Too bad the price tag is a hefty one :(. However, a free demo is availabe at Aficionado's site.

Well, this is just a selection of the chess products I consider best. There is literally tons of material for sale. However, with so much good and free software available, I guess there are only a few commercial products worth their prices.
- posted by Időbeosztás-guru @ 8:32 PM