Here's a few things I've built out of paper. These are made with ONLY paper and glue and I use 135GSM double sided glossy paper.

Chibi Vulpix - Pokémon

Chibi Golbat - Pokémon

Piplup - Pokémon

 

Starcraft 2 Marauder

Jigglypuff!

The pattern for this one was obtained from http://www.pokemonpapercraft.net/

 

The Unseen University

This was one of my first models, there's still more to it, however I ran out of space to store it so I moved on to making smaller models.