Mongoose Publishing's
Drow War Part 1 covers 1-10,
Part 2Covers 11-20, and
Part 3 covers 21-30. I played in part of Part 1 and it has a neat destiny background and set up for a drow invasion campaign.
Mongoose also put out
Ruins of the Dragon Lords which I don't have but is supposed to go from 1-20.
I've heard great things about Sovereign Press' 1-20 AP trilogy
Key of Destiny,
Spectre of Sorrows, and
Price of Courage which makes the Age of Mortals very engaging and epic for the players. There is also their redo of the Dragonlance Series in Trilogy megamodule format. Each of these six megamodules is only $10 in pdf.
War of the Burning Sky is war themed non dungeon crawl 1-20 adventure path, the all in one book is 700 pages and the pdf is onsale for $15.
Warlords of the Accordlands Campaign Adventure book goes from 1-20, is $16 and sets the PCs to fight against and eventually take down the evil conquerers of the world with a whole slew of non core alt classes, races, and monsters.
Dungeons of Castle Blackmoor has a 20 level old school dungeon, with lots of OD&D/1e wierdness style stuff.
Rappan Athuk Reloaded Starts off higher level but is a huge killer 1e style megadungeon with an Orcus theme.
Shades of Gray goes from 1-12 with disease and daemons as the motivators.
Coils of Set goes from 1-13 with a little more pulpy Indiana Jones theme going against set cultists, dealing with a sort of india type corrupt little village/city and has the character from the jack chick comic as an adversary.
A Lamentation of Thieves is supposed to cover 1-12 and shows a bit of different part of Necromancer's locales, including the bonegarden and others.
Lost City of Bararkus and Bonegarden are more sandbox elements to check out than adventure path stuff.
World's Largest Dungeon is themed dungeon crawls for levels 1-20 using all the core monsters.
Paizo has their 1-20 AP from dragon Shackled City, (Volcanoes, demons, and some other kind of fiend), Age of Worms (Undead), Savage Tide (Pirates, Jungles, Demogorgon), and their 1-12 Pathfinder APs, Rise of the Runelords (fairly straight), Curse of the Crimson Throne (part urban), Second Darkness (dark elves), Legacy of Fire (arabian), and the upcoming Council of Thieves (urban),
http://paizo.com/store/paizo/pathfinder/adventurePath. Paizo is known for being heavy on the combat challenge.
Goodman had Castle WhiteRock a dungeon crawl with plots to take the party from 1-15. They also had a couple module chains that were easy to turn into a short adventure path, such as the Saga of the Dragon one they did which linked up four modules.
Wizards had their original AP which was short modules very loosely linked with a dragon theme which went from 1-20 in 3.0. Their later mini campaign modules were much more linked thematically though shorter level ranges: War of the Spider Queen (drow in the underdark), Castle Ravenloft (Gothic Horror D&D), Red Hand of Doom (Tiamat army invasion), Queen of the Demonwebs (Planescape/drow spider queen).
I don't remember the level ranges for Black Flags over Freeport, but it is a huge pirate themed megamodule by Green Ronin. The original Trilogy covers 1-7 and is pirate, urban, and Cthulhu themed. There are followup modules including Vengeance and Crisis in Freeport.
