TruePDF is the first truly free PDF printer, creator, and writer that quickly create PDF files from virtually any application on Microsoft Windows 7, Vista, 2008, 2003, and XP without the need for GhostScript or Adobe Acrobat.
Very popular JPG image converter that combines basic image editing (resize, crop, rotate, watermark) with batch image conversion to JPG. It also features shell integration and you can convert files right from Windows. Command line supported.
Free program for video quality measurements. Supports more than 30 formats (AVI, AVS, YUV, Y4M, BMP, etc.) and 24 objective metrics (PSNR, SSIM, MSU Blurring/Blocking, MSAD, MS-SSIM, stSSIM, etc) including GPU accelerated SSIM-based metrics.