Oberlin Filter Company
Manufactures and distributes range of filtration products and equipment. Includes filter cloths, filter bags and cartridges, air filter units, and selection of new and used filter systems. Offers free analysis of wastewater samples.
http://www.oberlinfilter.com/

Exact Dewatering Solutions
UK based suppliers of water effluent treatment systems, ranging from pumps to filter presses and filter plates. Also offers refurbished spares and consumables.
http://www.exactdewatering.co.uk/

Herding Filtertechnik
Manufacturer of filter elements and filter systems.
http://www.herding.com/

Airid Pneumatic Filter Systems
Airid is one of the few air compressor dealers / air compressors manufacturers to offer a line of air dryers and industrial compressor pneumatic filter treatment systems, inline coalescer filtration equipment, and pumps resulting in oil free dry air lines free of contaminates.
http://airid.com

DVP Technologies
Eye Fidelity Tools include the moire filter, graininess filter and JPEG filter.
http://www.dvp.co.il/

Lianda Filter Equipment Co.,Ltd.
Anping Lianda Filter Equipment Co.,Ltd.is an exporter and manufacturer of stainless steel melting filter element, pleated and pipe type,disc filters and filtration wire cloth: over 80 percent of filter elements for export
http://www.lianda-filter.com/

AACplayer
The world's largest development and download repository of Open Source code and applications
http://sourceforge.net/projects/aacplayer/

Filter Specialists, Inc
FSI is the world's most innovative manufacturer of liquid filtration products. We've patented dozens of designs for filter vessels, filter bags and filter cartridges, providing our customers with improved efficiency and significant cost savings.
http://www.fsifilters.com/

MuRa's Filter Meister
Professional filters for Adobe Photoshop and plugin compatible programs such as Paint Shop Pro and available only for the Windows. They are made with Filter Formula. This filter collection is freeware.
http://www.geocities.com/murakuma/mmplugins.html

Filter Solutions
Solutions to all your electrical, IIR, and FIR filter design, synthesis and analysis software needs.
http://www.filter-solutions.com/