Here are some links to worksheets about anger (you can download the pdfs for free and print them):
The cycle of anger
The anger iceberg
This worksheet discusses when your anger might have become more of a problem rather than a healthy emotion.
A small introduction to anger management
The 'anger thermometer' to identify your own gradations of anger
Anger warning signs
Anger stop signs (intended for children but I like this too)
Worksheet to identify triggers
A summary of anger management skills
Coping skills to deal with anger
The 'urge surfing' technique
Improving the moment when in distress worksheet
Distress Tolerance Skills (self-soothe with senses / distractions)
Distracting from distressing emotions worksheet
Interpersonal Effectiveness Skills (communicating needs, fostering positive interactions and self respect)
Communicating needs worksheet
Emotional Regulation Skills (opposite action, fact-checking, paying attention to bodily needs, guiding focus back to positivity)
Brief explanation of some relaxation techniques to use when angry
Questions to ask yourself about anger (good journalling prompts)
The 'fair fighting rules' aka how to engage healthily in arguments
Template for keeping an 'anger diary'
Template for keeping a 'coping skills log'