In my researching, studying, and writing about custom post types, I have located the following sample custom post types. Some are example tutorials and some aren't. Some are complete and some aren't. However, regardless of the state of the various custom post types, it will serve as a good starting point for many of your custom post types. Please feel free to contact me with any more you may know about! This list does not include any custom post types that have been built into plugins that utilize custom post types. For example, Norcross's FAQ plugin utilizes custom post types for FAQ's or Travis Ballard's TB Testimonials. Plugins are a great place to research and learn more about the manifold purpose that custom post types can take.
My list below includes custom post types on portfolios, events, galleries, photos, podcasts, FAQs, movies, videos, client quotes/praises/testimonials, newsletters, products, before/after images, books, dogs, recipes, coupons, cars, zombies, artists, properties, websites, bookmarks, templates, and even presented as PHP classes. Surely one or some of these will be beneficial for at least one of your projects.
Portfolio:
1. http://www.ashbluewebdesign.com/2010/09/wordpress-portfolio-tutorial-custom-post-types/
2. http://thinkvitamin.com/code/create-your-first-wordpress-custom-post-type/
3. http://www.wpcode.net/how-to-create-wordpress-custom-post-type-1.html/ && http://www.wpcode.net/how-to-create-wordpress-custom-post-type-2.html/
4. http://www.astronautdesigns.com/2010/06/wordpress-3-custom-post-types/
5. http://www.vooshthemes.com/blog/wordpress-tip/create-a-professional-portfolio-using-wordpress-3-0-custom-post-types/
6. http://pippinspages.com/tutorials/stellar-wordpress-portfolio-control-with-custom-post-meta-types/
7. http://redlettersstudio.com/blog/2010/11/29/customizing-wordpress-part-three/
Events:
1. http://www.noeltock.com/web-design/wordpress/custom-post-types-events-pt1/ && http://www.noeltock.com/web-design/wordpress/how-to-custom-post-types-for-events-pt-2/
2. http://wptheming.com/2010/08/how-to-make-an-events-custom-post-type/
3. http://www.problogdesign.com/wordpress/events-list-with-custom-post-types-and-taxonomies/
4. http://headwaythemes.com/tutorials/how-to-create-an-events-page-with-custom-post-types/
5. http://www.designjuices.co.uk/2010/06/tutorial-wordpress-custom-post-types/
6. http://cmstutorials.org/tutorial/view/events_list_with_custom_post_types_and_taxonomies
7. http://sixrevisions.com/wordpress/wordpress-custom-post-types-guide/
Gallery
1. http://www.morgadinho.org/2011/03/01/skeleton-custom-post-type-week4/
2. http://shibashake.com/wordpress-theme/add-custom-post-type-columns & http://shibashake.com/wordpress-theme/modify-custom-post-type-icons & http://shibashake.com/wordpress-theme/add-metabox-custom-post-type
Photo
1. http://wordpress.stackexchange.com/questions/639/creating-an-image-centric-custom-post-type
Podcasts:
1. http://kovshenin.com/archives/extending-custom-post-types-in-wordpress-3-0/
2. http://eastbaywp.com/2010/09/september-2010-meetup-slides-custom-post-type-case-study-podcast/
FAQ:
1. http://net.tutsplus.com/tutorials/wordpress/creating-an-interactive-faq-with-wordpress-and-jquery-ui/ & http://www.code-pal.com/how-to-create-a-faq-page-with-wordpress-and-custom-post-types/ && http://www.freewebgallerys.com/2010/12/04/create-faq-page-wordpress-custom-post-types/
Movies:
1. http://wpengineer.com/1969/impressions-of-custom-post-type/
2. http://mikedance.com/2011/03/how-to-create-custom-post-type-archives-in-wordpress-3-1/
Videos:
1. http://wpworks.wordpress.com/2011/02/15/wordpress-custom-post-types-registering-and-displaying-in-a-very-easy-way/
2. http://wordpress.stackexchange.com/questions/737/implementing-video-of-the-day-feature
3. http://www.andrewdodson.net/2011/02/add-video-embed-meta-boxes-to-custom-post-type/
Client Quotes/Praise
1. http://redlettersstudio.com/blog/2010/07/12/practical-use-case-for-custom-post-types/
2. http://www.amberweinberg.com/working-with-wordpress-3-0s-custom-post-types/
Newsletter
1. http://www.re-cycledair.com/wordpress-3-custom-post-type-tutorial
Products
1. http://net.tutsplus.com/tutorials/wordpress/rock-solid-wordpress-3-0-themes-using-custom-post-types/
2. http://www.bernskiold.com/2010/11/15/adding-your-own-custom-post-type/
Before/After Images:
1. http://sicdigital.com/2010/07/create-custom-post-type-for-image-upload-wordpress3/
Books:
1. http://new2wp.com/pro/wordpress-custom-post-types-and-taxonomies-done-right/
Dogs:
1. http://www.noeltock.com/web-design/wordpress/tutorial-custom-post-types/
Recipes:
1. http://wpmu.org/easy-guide-to-displaying-custom-post-types-in-your-wordpress-theme/
Coupons
1. http://www.catswhocode.com/blog/how-to-create-a-side-blog-with-wordpress-3-0
Cars
1. http://heinencreative.com/archives/tutorials/creating-custom-post-types-in-wordpress-3-0/
Zombies:
1. http://www.slideshare.net/williamsba/custom-post-types-and-taxonomies-in-wordpress && http://www.slideshare.net/williamsba/surviving-the-zombie-apocalypse-using-custom-post-types-and-taxonomies-8058659
Artists:
1. http://www.kinocreative.co.uk/tutorials/using-wordpress-custom-post-types-and-taxonomies/
Properties
1. http://www.wordpresswise.com/custom-post-types-taxonomies-templates-with-a-lightbox-513
2. https://wpsmith.net/genesis/how-to-utilize-agentpresss-settings-custom-fields-in-a-separate-post-type/
Website
1. http://www.wpmayor.com/posts/step-by-step/ultimate-guide-wordpress-custom-post-types/
Bookmarks
1. https://github.com/mfields/mfields-bookmarks
Templates:
1. http://www.wpreso.com/blog/tutorials/2011/02/24/add-multiple-custom-post-types-quickly-and-easily/
2. http://www.wpinsideout.com/your-own-custom-post-types
Class:
1. http://somadesign.ca/projects/smarter-custom-post-types/
2. Links: http://curtishenson.com/wordpress-custom-post-types-and-meta-boxes-example/
Pigi says
Thanks for links, regards, pigi wpcode.net