Rogues Memorabilia
This book for very young readers was published in 2014.  It’s fully illustrated (by Steven E. Gordon, who designed the characters in the X-Men: Evolution animated series) and has very simplistic text explaining the basics of Barry Allen’s history.
Several Rogues (Captains Cold and Boomerang, Mirror Master, and Weather Wizard) appear as antagonists working with the Ultra-Humanite, and quickly get beaten up.

This book for very young readers was published in 2014.  It’s fully illustrated (by Steven E. Gordon, who designed the characters in the X-Men: Evolution animated series) and has very simplistic text explaining the basics of Barry Allen’s history.

Several Rogues (Captains Cold and Boomerang, Mirror Master, and Weather Wizard) appear as antagonists working with the Ultra-Humanite, and quickly get beaten up.

This is something I only recently learned about.  A 1976 DC stamp set made by Celebrity Stamps, which includes a handful of Rogues.  There were actually six sets (Flash, Supervillains, Batman, Captain Marvel, Wonder Woman, and Superman), and one big album for the stamps to go in.

These were simply collectibles, not actual stamps for mailing, but they’re very neat.  Some of the art is clearly taken directly from old comics and promotional art, and some might be original (or at least I don’t recognize it).  There was also a Marvel set.

I don’t own this (I’d like to), but it seems likely that anyone seeking to purchase it will have to spend a fair bit of money.

This 2013 book lists all the hero and villain pets in the DC Super-Pets universe.  Many appear in the Super-Pets series of books, but I don’t think all of them do — for instance, Captains Cold and Boomerang and their pets have entries in this encyclopedia, but as far as I know they haven’t yet appeared in any books.  Professor Zoom and his newts appear in their own book, however, as do Gorilla Grodd and his pet monkey.
The art is absolutely fun and adorable, and the creators clearly had fun inventing all these pets.  It’s very kid-friendly and overall quite cute, and still readily available for sale.
(You can see the entries for the Rogues and their pets here.)

This 2013 book lists all the hero and villain pets in the DC Super-Pets universe.  Many appear in the Super-Pets series of books, but I don’t think all of them do — for instance, Captains Cold and Boomerang and their pets have entries in this encyclopedia, but as far as I know they haven’t yet appeared in any books.  Professor Zoom and his newts appear in their own book, however, as do Gorilla Grodd and his pet monkey.

The art is absolutely fun and adorable, and the creators clearly had fun inventing all these pets.  It’s very kid-friendly and overall quite cute, and still readily available for sale.

(You can see the entries for the Rogues and their pets here.)

This children’s book with colour illustrations was published in 2003, and depicts the Justice League battling a scheme by Mirror Master, Captain Cold and Captain Boomerang.  
It also exists as a black and white activity book for colouring and games.

This children’s book with colour illustrations was published in 2003, and depicts the Justice League battling a scheme by Mirror Master, Captain Cold and Captain Boomerang.  

It also exists as a black and white activity book for colouring and games.

This 2013 book is different from the other Capstone DC books I’ve seen; the book is longer and clearly aimed at a slightly older audience (though it’s still for children).  The story is about Batman going undercover as Matches Malone to investigate a supervillain convention.  Though the Batvillains are naturally the most prominent, the Rogues are in it a fair bit.
The book is mostly text, with some illustrations.  You can see one of the art pages here.

This 2013 book is different from the other Capstone DC books I’ve seen; the book is longer and clearly aimed at a slightly older audience (though it’s still for children).  The story is about Batman going undercover as Matches Malone to investigate a supervillain convention.  Though the Batvillains are naturally the most prominent, the Rogues are in it a fair bit.

The book is mostly text, with some illustrations.  You can see one of the art pages here.

Out in 2011, this is volume one of an RPG sourcebook.  It contains alphabetized biographies and gaming statistics for a variety of DC characters, including several Rogues (volume 2 has the remaining characters).  This volume has entries for Abra Kadabra to Heat Wave, though curiously there’s nothing for Dr Alchemy.
The books are published by the gaming company Green Ronin.

Out in 2011, this is volume one of an RPG sourcebook.  It contains alphabetized biographies and gaming statistics for a variety of DC characters, including several Rogues (volume 2 has the remaining characters).  This volume has entries for Abra Kadabra to Heat Wave, though curiously there’s nothing for Dr Alchemy.

The books are published by the gaming company Green Ronin.

Cards from series I of the DC Cosmic Cards set, released in 1992 by Impel.  

The ‘Great Battles’ cards depict interpretations of classic comics storylines (for instance, the three cards with Dr Alchemy are re-creating scenes from Justice League of America v1 #21-22, and the Millennium card shows Suicide Squad’s involvement in the crossover).

Out in 2011, this figure is part of the DC Classics line.  It’s from Wave 18, one of the last before the series was discontinued from the mass market.  The figure is about 6.5 inches high, notably taller than the Captain Cold from this line.
(Incidentally, note the spelling error on the display base.  That was for promotion at Toy Fair; the figure doesn’t actually come with a base.)

Out in 2011, this figure is part of the DC Classics line.  It’s from Wave 18, one of the last before the series was discontinued from the mass market.  The figure is about 6.5 inches high, notably taller than the Captain Cold from this line.

(Incidentally, note the spelling error on the display base.  That was for promotion at Toy Fair; the figure doesn’t actually come with a base.)

In 1995, Skybox released a villains trading card set under the name DC Villains: The Dark Judgment.  The art is all painted and unique to this set (meaning it isn’t used anywhere else).  Several Rogues were part of it.

Out in 2012, this officially licenced t-shirt features Francis Manapul art from Flash v.3 #1.

Out in 2012, this officially licenced t-shirt features Francis Manapul art from Flash v.3 #1.