Today Topaz Labs announced their new Texture Effects 2 and is currently offering $10 off until October 30th with coupon code TFX2.
The Franzis NEAT Projects is 46% off till the end of the September (more info available here).
Macphun os also running some specials on their new Aurora HDR 2017 software (more info available here)
ON1 posted their first look of their upcoming Photo RAW software (more info available here).
Check Adobe's special offers for students and teachers.