Wireframing in Keynote

I have started to wireframe my PowerPoint/Keynote killer in... Keynote. Presentation design software is excellent to make mock up web sites or mobile applications, no need for special software. You have all the shapes at your disposal and can add basic interactivity with hotlinks that point to other slides in your deck. You can design icons yourself or use standard packs such as these, or these to make things look even more real.