Terragen

Alan Palmer Terragen
Contains several galleries of realistic and fantastic landscapes.
http://www.alanpalmer.org.uk/terragen.htm

Cresswell Graphics Terragen Gallery
Landscapes and seascapes created by Pam Cresswell.
http://www.cresswells.com/graphics/terragen/gallery/

Gallimaufry
Gallery of landscapes and mountains in 0.7 version. Includes several Bryce galleries as well.
http://www.incompetech.com/gallimaufry/pictures/more3.html

Kees's Terragen
Landscape images, free to use as wallpapers, and movies.
http://home-1.tiscali.nl/~veenen/

MQ Creations
Gallery with sea and lava scenes.
http://www.geocities.com/SiliconValley/Grid/1499/terragen.html

TerraCon Revolution
Monthly contest, galleries, and forum.
http://tcr.ashundar.com/

TerraEscape
Terragen and Bryce generated landscapes by Armands Auseklis, some of them post-processed in Photoshop.
http://www.homestead.com/terraescape/main.html

TerraNet - Virtual Worlds by Terragen
Collection of snowy landscape and seascapes scenes, in high-resolution 1024x768 can be used as wallpapers.
http://www.sweb.cz/terragen/eng/

TerraWest
Images done with 0.7 and 0.8 versions of the program, tutorials, and links.
http://kglgraphics.net/terrawest/

TumTum
Terragen rendered atmospheric landscape galleries, animation, and photography.
http://www.meredithlewis.co.uk/

Turx.com
Ensar Yanar's collection of landscapes, abstractions and models. In English and Turkish.
http://www.turx.com