REVISED this post with different names for some of the islands, as I've updated the region.
THE ISLES OF VALOSSA
This regions is inspired by two different d20 campaigns. The most obvious campaign is 
Freeport: The City of Adventure from Green Ronin. The less obvious campaign is from a now defunct d20 publisher known as Dark Portal Games. (No sign of the company for some time now.) The campaign is called 
Arekoz and the main book is the adventure 
White Robes, Black Hearts: Enigma of the Arcanexus.
I helped write the book and did some of the cartography. It's too bad the company has disappeared, as most of those who have read it, seemed to like it. I've decided that I don't feel right letting my work simply disappear into the breeze so I've created the 
Isles of Valossa to take advanatage of 
EotA, in conjunction with the 
Freeport Sourcebooks and my own imagination.
The Island of Arek
Calrendia
Calrendia is the location for most of 
Enigma of the Arcanexus. I haven't read up on Arekoz in a while so I can't say much about it. I believe it was designed to be the typical fantasy kingdom. However, since my 
Calrendia is very close to the equator, a lot of how the land is portrayed will be different. No knights in heavy platemail here.
The 
City of Gateway is one of the key cities in 
Calrendia and is a metropolis. DPG posted a free PDF detailing 
Gateway. which I still have. (I don't know if it is available anywhere still, but I will send a copy to anyone who wants to see it. The city is a great campaign location unto itself.)
Mhul
Another region from the 
Arekoz Campaign Setting, this one is a vital import for 
EotA. Not that I mind, the 
Empire of Mhul, as it's called in the book, is a great land of bad guys for the heroes to face. I've even thought of a way to tie 
EotA to 
Freeport and the idea of the lost 
Empire of the Serpents. As with 
Calrendia, the land lies in a warm tropical part of the world and will have to be modifed somewhat. All the better to make 
Mhul more to my liking.
Aste, Athe, and Nuvro
I decided to name each island on the map but I'm not going to write anything into stone for these islands. It's always nice to leave gaps for new ideas. (Two fo the names came from my old hand-drawn 
Triadora map.)
Darkfire Island
The name for this island realm is a turn of word from the name of a mountain range from the 
Arekoz Campaign map - Blackflame Peaks. I'm thinking 
Darkfire Island will be a mountainous island with warring orcs and dwarves.
Hurmfarlu Island
A group of 
Horn Minotaurs, that have broken away from the 
Empire of the Horned God, live on this island. 
Sardian Minotaurs here are larger and more bestial than their normal kin. Basically, they will be modified with the Gigantic template from 
Book of Templates: Deluxe Edition. (Don't know yet.)
Keoi Isle
Keoi Isle is the home of a kingdom of wizards, known as 
Abjura, with a taste for abjuration magic. On my world, this is where abjuration magic first originated. The god known as 
The Abjurer, or 
Abjios in the language of the 
Rachites (see below), is the island's patron god.
Merok Isles
This small group of islands, just north of 
Arek, is home to a culture similar to that of 
Mhul, a land that come from 
EotA. However, while 
Mhul is a dark and evil land, the 
Lands of Agul are more so. The islands have major undead problems, including unsafe passages into the 
Underearth.
I'm a big fan of what 
Piratecat has done with the 
DUNGEON Adventure about the 
White Kingdom. I think I have that issue. Perhaps there will be a connection between the 
White Kingdom and the 
Lands of Agul. Hmm... I'll have to wait and see.
The Rachis Isles
This group of islands is know for it devotion to the god known as 
Helios, The Sun Lord. The 
Rachites are a society of warriors, minstrels, sailors, and intellectuals. The theme here is Greek but none of the more "well known" Olympian Gods are worshipped here.
The Serpent's Teeth
The Serpents Teeth -- the islands known as 
Leeward, T'wik, Windward, and the large central island of 
A'Val. These are the islands of 
Freeport. If you don't know what 
Freeport is then where in the world have you been? Several of the islands that appear of the 
Arekoz map have been integrated into the 
Serpent's Teeth - 
Gelem & Gulmagesh. However, those islands are controled by 
Mhul.
If you want more information on 
Freeport then go to the following web address: 
Freeport: The City of Adventure - Freeport