Sessions summaries and graphs (including All-In Expected Value)

A fully configurable HUD adding stats about your opponents on your table(s)

Replayer showing call odds and pot equities

An overview of your results by type of game and stakes, including multiple currencies

A visual HUD layout editor which you can use to create and
customize as many HUD layouts as you want

Stats of your most frequent opponents (you can then get more detailed stats on any player)

You can filter on various parameters and quickly find matching hands. Each individual hand can then be opened in the replayer.

You can right-click at any time on the HUD to select another HUD layout

You can see your tournaments results and replay each tournament

Poker Lens is using a very fast hands importer.
(screenshot below taken on a Core Duo Mac from 2006)