Links

Amateur Radio - APRS
APRS Overview
Fixing the 144.39 APRS Network
Digipeating Paths in APRS
SSID Guide
APRS TO-CALLs
UI-View Maps
Internet to RF Messaging Via APRServe
APRS Internet Service
UI-View Add On's
XLAPRS
HamHud
Open Tracker
D7 Protocol Specification

Amateur Radio - Satellites
AMSAT
Amateur Radio on the International Space Station
ISS Visible Pass Predictions
Realtime APRS Data from ISS
Realtime APRS Data from PCSat
PCSat2
VK4TEC APRS Satellite Panel
Kenwood Radio on ISS
PCSAT2 Telemetry
G0MRF
Jerry Clement - VE6AB

Amateur Radio - General
PD0RKC
W9IF - Rich Parry
G6LVB.com
PA3ANG
Amateur Repeater Lookup
DTMF Tone Generator
High Altitude Balloooning Launch Announcements
Balloon v1.0
HF Antenna Analysis

Electronics Projects
Elementary Electricity
Electric and Utility Monitoring
Electric Meter Reading
Home Automation

Commercial Tower Resources
American Tower the leading independent owner, operator and developer of wireless and broadcast communications towers with more than 14,000 sites in the United States, Mexico and Brazil
Crown Castle owns more than 750 broadcast towers and 15,000 transmission sites
SBA more than 15,000 antenna sites in 49 of the 51 major U.S. wireless markets
Sprint Sites the 4th largest tower management company in the United States
Hirschfeld Communications over 250 towers
Pegasus Tower over 8,000 sites

Other
Tides Online
NOAA LaPlata Tornado Report
Tiny Computers