Some useful resources

• Getting Started with Topic-Based Writing
  A good introduction to Topic-based writing from  TechWhirl
• Documenting APIs
  A guide for technical writers and engineers
• Smashing Magazine
  50 Free Resources That Will Improve Your Writing Skills
• Core Practices for Agile/Lean Documentation
  This article summarises common  best practices for increasing the agility of documentation
• The Elements of Style
  The classic reference from William Strunk, Jr
• Online Writing Lab (OWL)
  Free writing resources and instructional materials.
• Taxonomy 101
  Definition, Best Practices, and How It Complements Other IA Work
• Google courses
  Overview of technical writing courses
• Writing Center Quick Guides
  Quick Guides provide concise instruction on a variety of writing skills, tasks, and processes.
• List of graphical user interface elements
  The most common elements of visual language interfaces found in the WIMP ("window, icon, menu, pointer") paradigm.