Explore free software.
Some of the best internet poker software (for use while studying) is actually free. PokerStove, and other such programs, allow a user to calculate their equity versus a range. Universal Replayer is a great tool for replaying a tournament hand history, especially for those not yet willing to pay for a program that includes a HUD.
HoldemResources.net has many features useful for tournament players, including a Nash Equilibrium calculator, and head's up Nash Equilibrium push/fold charts.