TEC++ (Popularity: ): Optical design and analysis software VOB by METEC with optimization. Focus Software, Inc. (Popularity: ): Offers optical engineering software and product descriptions for ZEMAX, OptiCAD, ZELUM, and LensVIEW. WinLase (Popularity: ): Software for laser resonator design and gaussian beam propagation (MS-Win, demo available). Optical Research Associates (Popularity: ): Optical design and illumination software. Also pages educating about optics. Breault Research Organization, Inc. (Popularity: ): Software and consulting services for the development and analysis of optical systems. Lambda Research Corporation (Popularity: ): Their products include the TracePro software for illumination analysis featuring tutorials on using a light pipe and the OSLO optical lens design software. Sinclair Optics, Inc. (Popularity: ): OSLO optical design software. Free evaluation level OSLO LT available. Sarkomand Software (Popularity: ): Optical simulation, particle beams, and other scientific software (Macintosh). MIT Photonic-Bands (Popularity: ): Software for computing optical band structures (dispersion relations) in periodic dielectric structures and photonic crystals (free, C source). Optical Data Solutions, Inc. (Popularity: ): Offers LensVIEW, a CD-ROM database of lens design examples found in the optical design literature, mainly from patents. Includes more than 30000 individual designs. Curve fitting software (Popularity: ): Focus is a curve fitting software for the Windows operating system that has been developed to facilitate spectroscopic modelling and data exchange Optical Systems Design, Inc. (Popularity: ): Information and download of SYNOPSYS lens design program (SYNthesis of OPtical SYStems) evaluation copy.