Risk means variability of outcome.  There are some generic risk management software as well as some specific project risk management software. 

Crystal Ball: Crystal ball a MS Excel based application. The individual values of a variable are replaced with a range and its probability distribution.  The estimate of the result is made a number of times and the mean and standard deviations of the result are considered in lieu of a single value.  The process is called Monte Carlo Simulation or simulation.   With insights gained from simulation one may take a better decision about the project.

Simulation for cost, resource requirements etc are often analyzed with a generic simulation package for project management.  A typical output showing the distribution of data from crystal ball is presented.

Decision Tools Suite:  The DecisionTools Suite from Palisade is a premium package about  risk analysis.  It brings together up to seven products: @RISK, PrecisionTree, TopRank, RISKOptimizer, BestFit, RISKview, and @RISKAccelerator. The programs themselves have been designed to work together in an integrated environment, running from a common toolbar in Microsoft Excel. Results can be seen in presentation quality graphics.  A view is presented in the following