Advanced Batch Converter does exactly what its title suggests, allowing you to easily convert multiple graphics files at the click of a button. More than that, you can also view, print, capture, and edit images directly to produce a variety of effects (resize, rotate, flip, mirror, crop, filters, morphing effects, watermark text, color enhancements).
The program supports 67 file formats: BMP, GIF, PNG, JPEG, RLE, DIB, PCD, ICB, ICO, WMF, TIFF, TGA, PCX, SCR, EMF, JIF, VDA, JFIF, RGB, AFI, VST, WIN, CEL, JPE, RGBA, PIC, PCC, CUT, PPM, PGM, PBM, SGI, RLA, RPF, PSD, PDD, PSP, CUR, TARGA, BW, TAR, JFI, EPS (preview), INT, INTA, FAX, JNG, MNG, 411, WBMP, WBM, ANI, PIX, THM, G3F, G3N, JP2, J2K, JPC, JPX, J2C, TPI, TPIC, PNM and PXM.
Along with the ability to batch convert you can carry out single conversions. It also includes full support for carrying out conversions (batch or otherwise) through the use of command line input.