How to Draw a Wireframe (Even if You Can’t Draw)
Even people with limited drawing abilities can learn to sketch a wireframe if they learn a few common conventions used to represent various design elements.
How To Succeed In Wireframe Design
Priority Guides: A Content-First Alternative to Wireframes
The Wireframe Perfectionist's Guide
BLOKK Font
… gives you a nice fill text for mock-ups and wireframing without the lorem ipsum. The new and better wireframing font.
Redacted Font
Keep your wireframes free of distracting Lorem Ipsum.
LittlePlane – Wireframe for Everyone
When you say “Wireframe”, you actually mean “Sketch”
WireKit
An iPhone App Wireframing Kit — A bunch of Photoshop shape layers to make wireframing your next iPhone app just a little easier.
Die Niehaus Wireframe-Technik
Methoden zur Konversionsoptimierung von Neuprojekten | Conversion Optimierung, Landingpage Optimierung
Responsive Web Design Sketch Sheets
Moqups
… is a nifty HTML5 App used to create wireframes, mockups or UI concepts, prototypes depending on how you like to call them.
Gesturecons
Icons For Multi-Touch Interfaces
UX Teams: Stop it with the wireframes. Please.