Common Lisp: An interactive approach
Electronic book introducing Common Lisp.
Git from the Bottom Up
A tutorial/reference that covers a lot of detail about git.
A Byte of Vim
Book that provides an introduction to vim. Comes in free electronic version and commercial hard copy version.
Write Yourself a Scheme in 48 Hours - Wikibooks, open books for an open world
Book that acts as a tutorial on both Haskell and Scheme.
Home – the Common Lisp Cookbook
A cookbook of Common Lisp code.
Read Loving Common Lisp, or the Savvy Programmer's Secret Weapon | Leanpub
Book that introduces Common Lisp.
Common Lisp: A Gentle Introduction to Symbolic Computation
Free book that should be a good introduction to Common Lisp for many people.
Fortran - Wikibooks, open books for an open world
Online book that contains a good introduction to Fortran.
Rust programming language