The US society for “free radicals in biology and medicine”:

(1) “critical reviews” at https://sfrbm.org/publications/critical-methods/

Eg “Even free radicals should follow some rules”: 

“Application of the greater understanding of chemistry has not been uniformly applied to biological studies. We suggest that some widely used methodologies and terminologies hamper progress and need to be addressed. We make the case for abandonment and judicious use of several methods and terms and suggest practical and viable alternatives. These changes are suggested in four areas: use of fluorescent dyes to identify and quantify reactive species, …. claims of antioxidants as radical scavengers, and use of the terms for reactive species…
the time has come for rigorous and precise use of these methods. We must stop accepting claims that reactive species are involved in a biological process based solely on the use of dye oxidation…
at this point in the evolution of free radical biology and medicine, adherence to appropriate and accurate terminology and methodology is really needed to advance the field.”

Others include: 

Measuring the poise of thiol/disulfide couples in vivo
Quantitative measures for redox signaling
Investigating mitochondrial redox state using NADH and NADPH autofluorescence

Utilization of fluorescent probes
Measuring reactive oxygen and nitrogen species with fluorescent probes: Challenges and limitations
On the use of fluorescence lifetime imaging and dihydroethidium to detect superoxide in intact animals and ex vivo tissues: a reassessment

(2) 100 PDF presentations archived: older but still useful resources for browsing at
https://sfrbm.org/education/frs-presentations/

Measuring The Poise of Thiol/disulfide Redox In Vivo (Dean Jones!)
Redox State and Redox Environment
Evaluating Superoxide/Hydrogen Peroxide in Biological Systems: A Chemist's View

Hypoxia Inducible Factor – 1 (HIF-1): A High Impact Factor
What is the Oxygen Tension in vivo?
Redox Regulation of Gene Expression: The Alphabet Soup of Transcription Factors

Cell Signalling Through The Thiol Group
Chalcogen Chemistry and Biochemistry: The Many Faces of O, S, and Se
The ABCs of Thiol Biochemistry (Hogg!)

Free Radical Basics: Concepts and Considerations

(3) @ ThinkTank: https://sfrbm.org/meetings/2021-annual-conference/travel-young-investigator-awards-1/
Deadline 10 September.