HEATKEYS

Make toys at home with common household materials, often in only a few minutes, that demonstrate fascinating scientific principles.

YouTube is a place to discover, watch, upload and share videos.

A gathering place for QRQ ops world wide to share information and experience in pursuing QRQ cw

HFLINK is the HF Automatic Link Establishment international resource for ALE High Frequency Communications, HF Digital Messaging, Emergency / Disaster Relief, Interoperative HF Communications, HF Network, Ham Radio.

AutomationDirect - Industrial control products: PLCs, AC Drives, Operator Interfaces, Enclosures, Pushbuttons, Sensors, Motor Controls, Power Supplies, and more!

Forum, Wiki, FAQ, Groups - the official Qt community site. Here you can get started with Qt, read tutorials, find solutions to your challenges and get up to date on the latest developments.

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

The American Radio Relay League (ARRL) is the national association for amateur radio, connecting to hams around the U.S. with news, information and resources.

Visit the official home page for Windows. Find help, purchasing info, and downloads for Windows 7, Internet Explorer, and other Windows products.