As far as remember, in Oblivion there is a spell for carrying more weight. Is there a similar spell in Skyrim?
There's no such spell in Skyrim.
You can carry more weight by:
- Wearing items with the Fortify Carry Weight enchantment
- Drinking a potion of Fortify Carry Weight
- Adding points to Stamina when you level up
- Giving some stuff to your hireling
- Climbing onto a horse
- Using The Steed Stone, allows you to carry +100.
- The Extra Pockets perk, which is part of the Pickpocket skill, also allows you to carry +100.