Computational Neuroscience software What are the most common software tools you use in your day to day work in computational neuroscience?

I am referring to neuroscience tools like GENESIS and NOT to generic tools like Excel.
Here is a comprehensive list of Computational Neuroscience Software

My opinion below comes form the perspective of nonlinear dynamics (using differential equations to model ion currents in neurons).  So more the math/physics/electrical engineering approach to Computational Neuroscience (not so much the Computer Science or Psychology approach):

Personally, I don't use pre-packaged tools like NEURON or GENESIS.  I take mathematical models established in literature (i.e. The Hodgkin Huxley model) and use Matlab or Python to model them.  I essentially do what Neuron or Genesis does, but I do it my way so I can extract the information that's relevant to me.  This is how I have been trained through physics and applied mathematics departments.  To not rely on other people's implementations.

For nonlinear analysis of dynamical systems (because there's really a lot of extravagant mathematics that you don't want to just code yourself) a lot of people use XPP/AUTO, designed, in part, by Bard Ermentrout (a well-known computational neuroscientist).  This is a good way to go if you're not into writing code, but I prefer a more hackable tool.  I've been learning Matcont, a similar toolbox for Matlab but since it is made with m-files (matlab's data type) you can hack it and make it into code to integrate with your own Matlab software, avoiding the GUI clicking and dragging.