GdViewer OCX is a low cost and royaltee free Image Viewer Activex control that supports a lot of image format like bmp, tif, jpg, wmf, gif, ico, png, pdf... It can be used from any 32-bit Windows development environment that can call ActiveX components (Access, Visual C++ , Visual Basic , Visual Foxpro, Delphi, .Net, MS Access, Windev, etc...) With Gdviewer you can view, zoom, print, rotate, Define Display Area, zoom on area, play animated gif..

FastCodec - free fast lossless video codec designed for video capture. Another usage - video data archiving. Supported input and output formats are: YUY2/YUNV/V422/YUYV, YVYU, UYVY/Y422/UYNV, RGB24, RGB32. Codec has two compression modes: lossy (only for RGB input) and absolutely lossless. Preview decompression mode allows fast decompression with poor quality. Compression/decompression algorithm is relatively simple.

Free high quality lossless video codec. It has the best compression ration among free lossless video codecs. Supports RGB, YUY2 and YV12. Allows to set up speed/compression ratio compromise by choosing appropriate motion compensation algorithm. Allows to set up loss/compression ratio compromises. Performs accurate denoisng in temporal and spatial domains during lossy compression.

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,
Adaptive and Non-Adaptive Prefix Codes and Run Length Encoding algorithm.

HTMLCompact is a powerful HTML compression tool created for webmasters. Its effective compression algorithm can reduce the size of your pages by as much as 80% while keeping the appearance of the page the same. By using HTMLCompact, your web pages will become much smaller which results in faster load times, saving you both bandwidth and disk space.

Backup 32 intended for data archiving tasks, using compression algorithm compatible with ZIP and other popular archivers, with support for external compression plug-in modules. Supports archives deletion by date of archive and by number of archives in specific directory.
Other features include: archives naming by current date, sending of messages across the network before and after archiving, mirroring directories over the network and much more

Zlib is a free general-purpose data-compression library. Integrity checks performed with the CRC-32 or the ADLER 32 checksums. In-memory operations use the zlib compressed data format (RFC 1950). Deflate (RFC 1951) is used for its compression algorithm. Typical compression ratios are between 2:1 and 5:1. The gzip format, RFC 1952, is supported for compressing files on a file system. Lacks support for PKZip 4.5, BZip2, and Deflate64.

High-performance and easy-to-use compression/encryption library. It has the all you need to compress and encrypt files, memory buffers and strings.
-Wide range of compression algorithms and modes
-Extremely fast modes
-Better rate than Rar, Zip, BZip
-Strong encryption - AES Rijndael
-One stream for transparent compression/decompression for write/read
-Forward and backward seeks in stream
-Read and write any portion of data

Xceed Streaming Compression Library is a high-performance "raw" compression library. It offers the ability to compress and decompress streaming data, buffers, strings or single files and supports multiple compressed data formats. Unlike Xceed Zip Compression Library, this ultra light library doesn't offer Zip file handling capabilities.

The library offers 2 well-known compression algorithms: the Deflate algorithm or the BZip2 algorithm.

SharpZipLib is a free, open-source compression library for .NET. It supports Zip, Gzip, Tar, and Bzip2, and also computes checksums. The library currently lacks Zip file splitting/spanning, customizable self-extracting Zip files, and reading and writing directly to memory. It is ported from the GNU Classpath Zip library for Java. The library and source code is distributed under the GNU General Public License, with an exception.