Pro Writing Aid - 50% recurring off - https://prowritingaid.com/en/App/Purchase
Coursera Plus $1 for the first month - https://www.coursera.org/courseraplus/special/cyber2021
Pluralsight 40% off - https://www.pluralsight.com/offer/2021/bf-cm-40-off
O'Reilly / Safari online, 40% discount, use CYBERSAVINGS21 - https://www.oreilly.com/
Apress - https://www.apress.com/us/shop/cybermonday-sale
NoStarch Press, 35% off + free shipping, use BLACKFRIDAY35 - https://nostarch.com/blog/2021-holiday-gift-guide (not affiliated with any of these)