Suggestions welcome for additional links!

Scala

• The Scala Programming Language website
• The Scala Documentation Project
  
• Online tutorials and exercises
  
  • I'm creating tutorials about Scala for first time programmers on my blog, Bcomposes.
  • Part 1: the Scala REPL, expressions, variables, basic types, simple functions, saving and running programs, comments
  • Part 2: Tuples, Lists, methods on Lists and Strings
  • Part 3: Conditional execution with if-else blocks and matching
  • Part 4: Iterating, mapping, filtering and counting
  • Part 5: Regular expressions and matching with them
  • Part 6: Regular expression matching and substitution with the Regex API
  • Part 7: Maps, Sets, groupBy, Options, flatten, flatMap
  • Part 8: Word counting, scala.io.Source, file access, flatMap, mutable Maps
  • Part 9: Objects, classes, inheritance, traits, Lists with multiple related types, apply
  • Part 10: Scripting, compiling, main methods, return values of functions
  • Part 11: SBT, scalabha, packages, build systems
  • Part 12: Code blocks, coding style, closures, scala documentation project
    
• SimpleScala: tutorial and online REPL for beginning programmers
• Kojo: a learning environment that includes an interactive Scala tutorial (which was adapted from SimplyScala)
• Scala School: Resources created by Twitter for training programmers new to Scala. 
• Stackoverflow Scala Tutorial: organized links to answers on Stackoverflow that cover many questions in Scala.
  
• Books
• Horstmann's Scala for the Impatient. (Free PDF of the first nine chapters is available for free from Typesafe!)
  
• Odersky et al's Programming in Scala (2nd edition) is excellent, though assumes one knows Java already. (Odersky is the creator of the Scala language.)
  
• Wampler and Payne's Programming Scala is available for free online.
• Pollack's Beginning Scala might be more introductory, though it is currently two years old and perhaps a bit out of date by now.
• For other options, see this list of books for learning Scala.

Applications

• XFST: The Xerox Finite State Toolkit, book and software
  
• XFST Tutorial
• XFST Reference page
  

Programming

• Beginners guide to programming.
• Unix
• Teaching Unix Tutorial
• Unix Tutorial for Beginners
• Cygwin Walkthrough and Beginners Guide
  
• Editors for writing your Scala code
  
• JEdit - Multiplatform, easy to use editor.
• Kate - Easy to use editor with built-in Scala support, but only works (easily) on Linux.
• ScalaEdit - An editor designed with Scala in mind. It looks to have been started as a project fairly recently, so I'm not sure how robust it is -- but it could be well worth a try.
  
• Emacs - my editor of choice, but probably not ideal for most students in the class
• Integrated Development Environments - more powerful programming environments. Unnecessary for this class, but worth mentioning.
• Eclipse - has continually improving support for Scala
• IntelliJ IDEA - apparently works well with Scala out of the box