iqr is a simulation software to graphically design and control large-scale neuronal models. Simulations in iqr can control real-world devices in real-time. iqr can be extended by new neuron, and synapse types, and custom interfaces to hardware.
I have been using IQR as a master student and I must say I really like the paradigm behind it. It's an under development software, so of course you can find issues here and there but nothing major. The overall software design is just amazing.
I have been using IQR for fast prototyping of networks where topography plays a crucial role. The simulations are easy to setup, and the GUI is quite well done. There are little quirks, but nothing major. Excellent tool for prototyping.