Where to get responsive phpbb themes. Any free download site for this
animon09 why not you try their official page? You can find free themes and extensions there. https://www.phpbb.com/styles/
If you want a free fully responsive layout/theme, it will be difficult for you. Free versions will not be of that high quality.
Rather you should go for a paid one. I am sure, there are many beautiful fully responsive designs available for under 20 bucks. 😊
I am not sure there are many attractive free themes
This one has some very good looking themes listed. But all of them are paid.
I can help you customise it. I am no expert, but there are things we can do with some minimal effort. But that will be only skin deep.
Razor1911 I got some paid responsive phpbb themes in themeforest