Slides Carnival is a great website with various templates that work with both, Powerpoint and Google Slides. All templates are free for downloading.
Use them, share them, comment on them, and share my link in return.
English Language Teaching Global Blog
Life and learning in South Korea and Japan
Ideas for creating immersive learning experiences
John Hughes, ELT author & teacher trainer
Education, lesson plans, technology
A place for learning about online education
by Anthony Ash
The Official Blog of the Slovak Chamber of English Teachers