New freebie from the CBLDF at Comixology.
https://www.comixology.com/CBLDF-Banned-Books-Week-Handbook/digital-comic/264860

New Submit sale is 50% off the series Template with codeword TEMPLATE, sale ends 9/9/15.
https://www.comixology.com/Get-50-Off-Template-1-8-Use-Code-TEMPLATE/list/8113
The first issue is free.
https://www.comixology.com/Template-1/digital-comic/46037

Promo code WANDPOD nets Tailwands #1 for free at http://www.comixology.com/redeem/

https://www.comixology.com/Tailwands-1/digital-comic/169247

Lots of new sales today.

From Marvel until 9/6/15, twelve Star Wars collections at up to 80% off.
https://www.comixology.com/Star-Wars-Collections-Sale/page/8012

Atomic Robo sale until 9/8/15; nine collections are half price at $4.99 each.
https://www.comixology.com/Atomic-Robo-Sale/page/7976

Dark Horse Omnibus sale until 9/6/15; 35 collections at up to 65% off.
https://www.comixology.com/Dark-Horse-Omnibus-Sale/page/7981

Another Marvel sale on Superior Spider-Man (did this title not sell well?), up to 66% off and ending 9/8/15.
Superior Spider-Man 1-31 and 6au
annuals 1-2
All New X-Men Special 1
Indestructible Hulk Special 1
Superior Spider-Man Team-Up Special 1
https://www.comixology.com/The-Superior-Spider-Man-Sale/page/4052

Another sale on a Jodorowsky book; all six volumes of The White Llama are $1.99 instead of $5.99, unknown duration.
https://www.comixology.com/The-White-Lama-Sale/list/8067

Dark Horse weekend sale should be up soon. I'll predict horror books.
https://digital.darkhorse.com

New freebie at Comixology.
https://www.comixology.com/Boys-Over-Flowers-Season-2-Vol-1-Side-Story/digital-comic/286299

Marvel Monday is on Spider-man 2099.
issues 1-12 of the 2014+ series
issues 1-23 and annual 1 from the 1992+ series
https://www.comixology.com/Spider-Man-2099-Sale/page/8000

Yet another sale on Crossed; save up to 72% via the 108 book bundle, sale ends 9/13/15.
https://www.comixology.com/Crossed-Sale/page/8029

Question for those who might know - anyone know where one can find Cowboys and Aliens online? It seems to have done a vanishing act and its official websites are years out of date (or least the ones google threw up for me are).

Also anyone know if Comixology does a full page of their free comics? I know they've a recommended page but it doesn't list all of them. Thus far I have found this :
http://www.bleedingcool.com/2013/03/24/five-hundred-and-twenty-five-free-digital-comics-from-comixology/

Which is a little out-of date and a few are missing (or require searching as the original links don't work) and some are now paid-for (though mostly for small under £/$1 amounts). It's also rather a long list to go through, but there's some good free comics there and certainliy a good place to get started for some series

Comixology has had well over a thousand free comics over the years, but they are usually for a short time only.

Now, they maintain a free page linked on their home page of ~100 freebies. This list usually changes at least once a week, titles being added and removed. Hit add all to make sure you get all 4 pages of them.

The best way to find most of the current several hundred freebies is to do separate searches for the following terms, and then looking through the individual pages of issues, one shots, extras, etc etc. Very time consuming, but once you do this once all the new freebies will likely be linked in this thread.

Free
Fcbd
Preview
Sampler
Sneak
Peek

Three big new weeklong sales, all ending 9/14/15.

From Marvel, a sale on Avengers collections; 8 books at up to 80% off, $3.99 each.
Age of Ultron: The Complete Event
Avengers World vol 1
Vision: Yesterday and Tomorrow
Avengers: Vision and the Scarlet Witch
Original Sin: Hulk vs Iron Man
Ultimate Comics Hawkeye
Avengers Mythos
Avengers Assemble
https://www.comixology.com/Avengers-Collections-Sale/page/8023

From DC, celebrate the 75th anniversary of Green Lantern with nothing from the original GL, but some more modern stuff. Silly DC.
Green Lantern: Rebirth (2010) 1-6
Green Lantern (2005-2011) 1-67
Green Lantern Corps: Recharge (2005-2006) 1-5
Green Lantern Corps (2006-2011) 1-63
Green Lantern Emerald Warriors (2010-2011) 1-12 plus free preview
Green Lantern: Secret Files (2005) 1
Green Lantern: Sinestro Corps Special (2007) 1
Green Lantern/Sinestro Corps: Secret Files 1
https://www.comixology.com/Green-Lantern-Sale/page/8008


From IDW, Transformers Combiner Wars, two collections with just twelve issues of the storyline at $5.99 each and/or 25 singles of the entire storyline at $.99 each. Wasn't there a Transformers Humble Bundle?
https://www.comixology.com/Transformers-Combiner-Wars-Sale/page/8025

Want an extra 25% off all your DC, Marvel, and other app comics? $100 iTunes cards for $75.
http://www.ebay.com/itm/100-iTunes-Code-for-only-75-Email-Delivery-/281790719975

I just spotted a 142-page collection, the Green Lantern Corps (2006-2011): Sins of the Star Sapphire, for less than 1 euro: https://www.comixology.eu/Green-Lantern-Corps-2006-2011-Sins-of-the-Star-Sapphire/digital-comic/101878

It seems to be a prelude to Blackest Night. I think someone here (maybe ET3D) mentioned reading Blackest Night and not enjoying it because it lacked a good chunk of background information and it was mostly battles, so you might want to check it out.

Or maybe that user was talking about The Sinestro Corps War. Man, my memory sucks. And the search function of this forum too. :D

Well, anyway, it's a good deal.

This is odd. This 142 page GL Corps collection doesn't show up in the list of Green Lantern sale items, but when I hit "add all to cart" it appears for 99 cents. It collects issues 27-32. I think I already owned those issues, but, for $.74, I couldn't resist.
https://www.comixology.com/Green-Lantern-Corps-2006-2011-Sins-of-the-Star-Sapphire/digital-comic/101878

Week two of the Marvel Firsts sale adds another two girl hero books for $.99 each.
https://www.comixology.com/Marvel-Firsts-Sale-Up-to-75-off-for-a-limited-time/list/8110

Looks like the sale is still on. Anyway, I read House of the Worm, and it's okay, nothing great but not terrible either. Should have been continued, it's basically an introduction to the world.

From all the comics I bought in recent months, Fables is the one I enjoy most. It's simply the best written. I also enjoyed Mercy Thompson, but it just made me want to read the book, and so I stopped reading it.
Thanks. Well, it was The Sinestro Corps War, but I mentioned Blackest Night in that post. Since that was also a preview to Blackest Night, I thank you for giving me yet another angle on this for a low price. Perhaps I'll enjoy this one better.

Geoff Johns run on Green Lantern is a lot of fun (I personally really enjoyed Sinestro Corps War); $0.99 for the Sins of Star Sapphire collection is an epic deal (although I admit I haven't yet read that arc in the series).

This is at least the second time there's been a pricing error on DC trades (Fables: Werewolves of the Heartland was similarly $0.99).

New freebie at Comixology.
https://www.comixology.com/Apama-The-Undiscovered-Animal-1/digital-comic/45574

New Humble Bundle on Neil Gaiman miscellany, including some comics. It's apparently breaking records in that the average price keeps rising well above the highest tier.
https://www.humblebundle.com/books

Five big new sales for the weekend; also, the weekly Submit sale hasn't rotated yet, but should soon I guess.
https://www.comixology.com/submit

Dark Horse has the Savage Sword of Conan collections on sale at Comixology until 9/13/15; 21 different collections at $6.99 each.
Savage Sword of Conan volumes 1-19 reprint in their entirety the old Marvel magazines of the same name, issues 1-201.
Robert E. Howard's Savage Sword volumes 1-2 reprint issues 1-8 of newer material of his classic characters.
https://www.comixology.com/Savage-Sword-of-Conan-Sale/page/8076

The Rick Remender sale is full of great Image stuff, ends 9/14/15.
https://www.comixology.com/Rick-Remender-Sale/page/8064
Black Science 1-16
vol 1 of 1-6 $4.99, vol 2 of 7-11 $5.99
Low 1-8
vol 1 of 1-6 $5.99
Strange Girl 1-18
omnibus of all $14.99
Deadly Class 1-14
vol 1 of 1-6 $4.99, vol 2 of 7-11 $5.99
Sea of Red 1-13 (complete series) (see below)
Sorrow 1-4 (complete series) (see below)
Crawlspace XXXombies 1-4 (see below)
Crawlspace Omnibus 1 is $11.99 and reprints Night Mary, Sorrow, XXXombies, and Creatures #1
Crawlspace Omnibus 2 is $11.99 and reprints Sea of Red and has bonus material
The Last Christmas collection is $11.99 and reprints that 5 issue series with art by Remender

The Dark Horse weekend sale should be up shortly; it might be Conan judging from the Comixology sale.
https://digital.darkhorse.com

Action Labs has their entire line at 50% off with codeword ACTION, ends 9/13/15. So it's over 250 books from 66 different series, I won't be listing them all.
https://www.comixology.com/Action-Lab-Sale/page/8114

A today only sale sale from Marvel has a bunch of New Warriors.
issues 1-12 of the 2014+ series
issues 1-17 and annuals 1-2 of the 1990+ series
https://www.comixology.com/New-Warriors-Sale/page/8068

Last day of the Groupees Valiant Bundle - and I'm still undecided ... According to a reading order I googled, it looks like the Humble Bundle covered the whole Act 1 of the "Valiant universe" plus parts of Act 2. The Groupees Bundle contains parts of Act 1, Act 2 and Act 3 (including the whole Armor Hunters event, as was pointed out already) but there are still parts of Act 2 missing. Man, I really can't decide. Maybe it's better to wait for another Humble Valiant Bundle that directly continues the first one?

I hate decisions! ;-)