JurikSoft Compression Library 

JurikSoft Compression Library is a .NET component with a set of methods, which allow Compress array of bytes using lossless compression algorithms. Current version of compression library include following compression algorithms: LZSS e.t.c
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Rarissimo 

WinRar companion for periodic compression scanning files with streams candidates to an ftp send, compressing with normalized filenames to a target folder and restoring Macintosh structures, filenames and NTFS Win 2K files properties after reception
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CrackTiff 

CrackTiff is a tiff converter & merger, enables you to convert tif files from one compression mode into another, such as convert uncompressed tif into PackBits, group 3, group 4 compressed tif files. You can also merge more tif files into one.
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Boomer 

Now with Flash MX Compression support, they use the technology broadcasting GnomeRadio and now folks you can too. Stream your audio and video, create slideshows. Convert your mp3's + wave files to streaming format that half a billion user have. NOW
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ZipEnable 

ZipEnable offers fine-grained management of IIS 6.0 built-in HTTP compression for reduced bandwidth, faster pages, and a more efficient Windows Web server. Configure static & dynamic compression for (X)HTML, ASP, JavaScript, CSS, ColdFusion & PHP.
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DOLly 

DOLly image converter/compressor for users and specialists. Special purpose is to introduce L* Data Compression Methods via appropriate L* files, as well as to take info or to make conversions among usual (BMP, GIF, JPG, PNG, TIF) files.
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