Rectilinear
MayaVi for Windows v.1.5
MayaVi1 is a free, easy to use scientific data visualizer.
Fisheye-Hemi Mac v.1.2.1
The Fisheye-Hemi plug-in automatically remaps your fisheye images to minimize distortion and maximize the preservation of all image details.
PTMac v.4.1
PTMac is a simplified front end for creating panoramas using Panorama Tools.
Proxel Lens Corrector Mac v.1.2.2002
With this Photoshop plugin you can improve the pictures from any digital camera or camera/lens combination you own.