The weekend Dark Horse sale isn't up yet, but it'll likely mimic their Comixology Frank Miller offering.
https://digital.darkhorse.com
A fifth week of the Marvel female firsts is up.
https://www.comixology.com/Marvel-Fi...time/list/8110
Today only sale from Marvel is on a couple different runs of Inhumans.
the current series, Inhuman, 1-11
Inhumanity 1-2
Inhumanity: Awakening 1-2
Inhumans (1998) 1-12
https://www.comixology.com/Inhuman-Sale/page/8343
From Jet City, an unknown duration sale on Wool.
https://www.comixology.com/Wool-The-...Sale/list/8426
Weekend Dark Horse sale at Comixology is on nine Frank Miller collections for $6.99 each; 300, Sin City volumes 1-7, and The Art of Sin City.
https://www.comixology.com/Frank-Miller-Sale/page/8326
Another Viz bundle sale; I think I like that Tokyo Ghoul.
https://www.comixology.com/Viz-Bundl...Sale/list/8397
Weekend sale from Image on some work from the Luna Brothers.
Alex + Ada 1-15
Girls 1-24
The Sword 1-24
Whispers 1-6
Ultra 1-8
plus five collections of some of the above and
Star Bright and the Looking Glass
https://www.comixology.com/The-Luna-...Sale/page/8327