A few years ago I was looking for a list of scientific journals that published commentary pieces (e.g., letters to the editor, essays, more policy-oriented pieces) for what would become Fox et al. 2015. I couldn't find a comprehensive list, so I started one. It's largely focused on conservation, ecology, environmental management, and sustainability science. Some articles are peer-reviewed while others aren't.
I'll update it once in a while. Please comment with a link (or email/DM me) if you know of other venues and article types.
Also, here's info about open-access fees in ecology, evolution, & conservation journals (not sure who made it).
Conservation scientist at the Yellowstone to Yukon Conservation Initiative (Y2Y). Likes trees, mountains, chocolate, and looking under rocks. Feminist.