Note: since Poser is a human-figure application, some of the sites may contain artistic nudity. I will leave it to your own discretion whether or not you should visit the sites.
Adobe Systems, Inc
They make lot of great 2-D and 3-D programs, including: Acrobat Reader, After Effects, GoLive, Illustrator, Photoshop, Premiere, and others!
DAZ 3D
The current owners and developers of DAZ|Studio, Bryce, Carrara, and the digital human figures: Vicky, Mike, Genesis 2 and 3, and more.
Renderosity
The current owners of Poser and one of the largest Poser and digital artwork resource sites on the Internet. Includes forums, tutorials, galleries, free items, and a large marketplace.
e-on software
The makers of Vue d’Esprit, an excellent, easy-to-use 3-D program which has the ability to import Poser pz3 files.
Newtek
The makers of Lightwave 3D, an excellent modelling (and rendering) program.
Vanishing Point Merchandise
An online catalog of merchandise my with my artwork, including a wide range of Tabby images on mousepads, mugs, clocks, and more.
DeviantArt
My image gallery at DeviantArt.
My store at CGTrader.
Sparkyworld
The home of mrsparky, the excellent texture artist and 3d model maker.
Stefan Werner's Site
Excellent tutorials for Poser. Check out the "FireFly options overview" page on how to optimize the settings for Poser's FireFly renderer.
If you would me to add a link to your site, just let me know.