Let's go, then !
First of all, there's a great turn-based strategy game called Battle for Wesnoth, that is fully (so, including the music) released under free licences. Some of the musics (especially the elvish theme) may fit for med/fan servers. Sorry, I don't know any link to directly listen them from the browser, but you can download them with the game or from the github repository. Here's a summary:
https://wiki.wesnoth.org/Available_Music
Then Laei made some calm, a bit sad ambient music that could fit for nostalgic or introspective moments, like when Alex is remembering her grandma. I personally find “Petit pantin au cœur de glace” (french for “Little puppet with a heart of ice”) particularly fascinating.
https://laei.bandcamp.com/album/eponyme-i-a-soundtrack-for-my-life
Now, let's come to Dogmazic. That's the website of a french association promoting music released under Creative Commons and other free licenses. There's a lot of really good things here, so I suggest you to search the whole site, but here's some pointers:
Greg Baumont released an album called “Wood”, with various ambient music. I especially like “La sixième porte de shanaaghar” (“the sixth door of shanaaghar”, don't know what shanaaghar is supposed to be) and “The blue star”.
https://play.dogmazic.net/albums.php?action=show&album=670
Dogers made an album called “Contes à la lueur d'une bougie” (“Tales by candlelight”) that can easily be used as a soundtrack for table role-playing game or for some good old RPG-maker game. My favourite here is “Un bien étrange marché” (“a very strange market”) that can fit for visiting curious places, but “Profondeurs” (“Depths”) and “Confrontation” can also work for worrying situations.
https://play.dogmazic.net/albums.php?action=show&album=8997
Ehma has uploaded several albums of various genres on the site. I especially like “Pizzicato”, for instance for a journey sequence, or “La porteuse d'eau” (“The water carrier”) where the intro gives me vibes of coming home after a long trip.
https://play.dogmazic.net/albums.php?action=show&album=441
If you're looking for tropical, jungle themes, maybe Philippe Mangold's work can do the job too, with tracks like “amazonia”.
https://play.dogmazic.net/albums.php?action=show&album=1946
Well, I'll stop here for now, that's already a lot of things. But as I said, don't hesitate to search through Dogmazic, there's really a lot of gems here.
Hope some of this will help!