Two Scandinavian heroes are often cited as being associated with material analogous to Beowulf. The Icelandic saga of Grettir the Strong includes several stories that are reminiscent of Beowulf - particularly Grettir's struggle with the walking dead Glamr. These stories tend to fall into a group catalogued by Aarne and Thompson as Take Type 301, the stories of the bear's son, a hero of epic strength who battles ferocious monsters and is often left for dead by his companions. The hero emerges, of course, and with proof of his victory over the adversary.

These stories are called Bear's son stories because the hero often has a bear for a father, and indeed, we see evidence of this embedded in the name "Beowulf" with means "bee wulf" or "ravager of the bee," an attribute often associated with the bear because of his quest for honey; compare Swedish "sötfot" (sweet foot) and Russian "medved" (honey eater).

In the Old Norse saga of Hrolf Kraka, King Hrolf fights his last, greatest battle, but Bothvar Bjarki (warlike little bear), his best warrior, is asleep and cannot be awoken. A large, ferocious bear, however, fights for the king. Finally, Bjarki awakens and enters the battle, but the bear disappears. The story of Bjarki is also regarded as an analogue of Beowulf. His story also appears in Saxo Grammaticus' Gesta Danorum.

I am a fan of Sigurd/Siegfried.

The Nibelungenlied is pretty awesome. the volsunga saga is good as well.

The song of the nibelungs is one of my favorites.. basically a man gets dipped in dragon's blood and become impervious to weapons.. except a small spot on his back. He goes adventuring and become rich and well known.

he becomes friends with a guy, they help each other back and forth. the man wants to marry his friend's sister but the friend wants to find a wife himself.. but only wants this crazy woman known for testing suitors and killing them if they don't win. the man helps his friend get this woman.

everyone is happily married, the sister and the crazy lady start to hate each other, the sister implies that the man is the one that actually "conquered" the crazy lady (a plot line involving a magic ring and the help the man gives to the friend)

this starts a rivalry between the ladies, the crazy lady gets the man killed... the sister is then married to a foreign king.. .and she plots her revenge...

it is a great read.

ohhh, i'd also suggest Njal's saga... great read

In addition to the Norse sagas others have mentioned, there were almost certainly other poetic narratives which are unfortunately lost to us. Alcuin, an 8th-century Anglo-Saxon cleric, penned a letter complaining about the monks at Lindisfarne's interest in hearing an epic concerning the hero Ingeld (mentioned in Beowulf and the Norse sources,) famously demanding to know "What has Ingeld to do with Christ?" Deor, an anonymous Anglo-Saxon poem, mentions in passing a number of (presumably well-known) heroes of whom little is known today. There's reason to believe much more has been lost.

Historical figures could also take on almost mythic dimensions over time. There are a number of works, for example, concerning the Gothic king Theoderic, who is often cast as an enemy of the Huns. Some Norse sagas on this legend cycle survive, as do a number of Middle High German romances, where he appears as "Dietrich of Berne."