Cube from pyramid units by Tomoko Fuse

(This model is incomplete, but the unfinished part is in the back.) From Tomoko Fuse's Unit Origami. 

Candy dish (traditional)

From diagrams handed out at an International Dinner, Allegheny College (year unknown, probably around 2006–2009).

 

Dog desk organizer(?) by Akira Yoshizawa

Google Translate switched between "dog purses" and "dog accessories put", which I figured might mean "a place to put your desk accessories (paper clips, etc.)". From Akira Yoshizawa's Creative Origami.

Modular 6-pointed star by Lewis Simon

Made with three squares. From the West Coast Origami Guild Newsletter, September 1993.

Oni mask by Akira Yoshizawa

(An oni is a type of Japanese horned troll or ogre.) From Akira Yoshizawa's Beautiful Origami.

Petal Dish by Terry Hall

I used two back-to-back sheets. From the West Coast Origami Guild Newsletter, June 1993.

Automobile by Akira Yoshizawa

From Akira Yoshizawa's Origami Museum II (Seasons and Traditional Japanese Events)

Swimming manatee by Robert J. Lang

From Robert J. Lang's Origami in Action

Sparrow by Gloria Farison

From Gay Merrill Gross's The Origami Workshop

 

Camel by Paul Jackson

From Paul Jackson and Angela A'Court's The Ultimate Papercraft and Origami Book

Piano by Utako Okada

From the Nippon Origami Association's magazine Origami (1976; uncertain of volume, numbering, etc.—the "12" probably only refers to the December issue). I have only a bad black-and-white photocopy of this.

Boat with roof (also known as sampan) (Traditional)

From Tokinobu and Hideko Mihara's Origami: Volume 2.

Adirondack chair by John Szinger

From John Szinger's Origami Animal Sculpture

Bluejay by John Montroll

Possibly the worst job of folding I have ever done. From John Montroll's Origami Inside-Out.

Struthiomimus by John Montroll

From John Montroll's Prehistoric Origami

Heart coaster by Francis Ow

Made from two squares. From Rick Beech's The Origami Handbook

The Undead by Richard Saunders and Brian Mackness

From Richard Saunders and Brian Mackness's Horrorgami. (Posed with coffin from earlier post.)

Coffin by Hyo Ahn

From Hyo Ahn's video at this YouTube site

Box with cranes on lid by Tomoko Fuse

Made with 8 sheets of paper. From Tomoko Fuse's Decoration Box (Origami Collection 1)

Men's suit by Jeremy Shafer

From Jeremy Shafer's Origami to Astonish and Amuse

Cockroach by Margaret W.Campbell (maybe traditional?)

From Margaret W. Campbell's Paper Toy Making.

Snail by Kunihiko Kasahara (maybe traditional?)

From Kunihiko Kasahara's All of the Latest Origami

Thai Flower (traditional)

From Joan Appel and Alice Gray's Origami Flowers and Flower Arrangements.

Recent Folds (13 May 2020 – 2 June 2020)

Flower by Philip Shen

Made from a pentagonal sheet of paper. From Paul Jackson's Philip Shen: Selected Geometric Paper Folds (British Origami Society Booklet No. 18)

Kangaroo by John Montroll

From John Montroll's Bringing Origami to Life

Paperoni pizza by Russell Cashdollar

From OrigamiUSA's  2003 Origami Collection.