Here is an aggregate of software stories of some tools that have been released to the Operations Research community lately.
Gurobi free trial
As pointed out by many blogs (Yet Another Math Programming blog and OPSRES blog) Gurobi has released their free trial version 1.1 for download.
OpenOpt, the python optimization tool kit, has updated their Global Solver kit with PSwarm 4.1 solver which will help with some minor optimization speedups.
Hakank of the Constraint Programming Blog announced the release of MiniZinc version 1.0. MiniZinc is a constraint programming modeling language which is free software released under a BSD-style license. Hakank does a complete write-up of all the features of MiniZinc and its derivative software packages.