When writing a formal or business letter, presentation style and format is key to making a good first impression. These templates provide excellent examples of how to structure such a letter, and include sample content to act as a guide to layout.
This sample policy memo serves as a template for Cornell INFO 1200 students who would like to use LaTeX rather than Word. Usage of section headers, bulleted lists, and references are included. Most features including page layout and citation style can be easily tweaked.
Alice Chen, with adapted TexMemo package by Rob Oakes
Basic template for German letters according to the DIN 5008 standard
It is building on scrlttr2, so everything should be pretty much self explaining.
For contributing, see https://github.com/ckuenzle/din5008-letter.