Any DWG Converter is a batch DWG converter that allows you to convert DWG to DXF, DXF to DWG without the need of AutoCAD. It is also an AutoCAD drawing file version converter.
Downloads: 82111 - Shareware - Download Now

Full-featured batch image, graphics, and photo editing and converter software for 140+ formats (JPG, JPEG2000, PDF, etc). Complete command-line operation and an entire arsenal of editing features (batch resize, flip, rotate, crop, trim and much more)
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If you need a tool to convert a 100 odd files that are in various different formats into one format, Image Convert is what you need. Supports JPG, GIF, PNG, BMP, WMF, EMF and TIF formats.
Downloads: 53820 - Freeware - Download Now

This software offers a solution to users who want to add visual effects to several images. The user chooses the files or an entire folder to be processed.
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Program for creating Single Image stereograms with 3d animation support. 3 rendering algorithms, including hidden surface removal and distortions compensation. Removing 3D object slices. 24 bits color images up to 10000x10000 pixels.
Downloads: 62300 - Shareware - Download Now