VoIP:
 

IRLP: http://www.irlp.net/
 

Echolink: http://www.echolink.org/
 

EchoIRLP: http://www.echoirlp.org/
 

DF2NU: http://www.df2nu.de/ (German)
 

Google Maps IRLP Reflectors: http://www.kc5cqm.org/IRLP-GIS/gmap/
 

DX & Contesting:

DX Code of Conduct:  http://dx-code.org/
 

AC6V's Amateur Radio and DX Reference Guide: http://www.ac6v.com/

NG3K DX links: http://www.ng3k.com/
 

DX Summit: http://www.dxsummit.fi/
 

DXWATCH: http://www.dxwatch.com/
 

DX Atlas: http://www.hamatlas.eu/index.php?setlang=ENG&lang=ENG

Pathfinder (QSL):  http://www.dxlabsuite.com/pathfinder/WebClient/

LoTW Resources by HB9BZA:  http://www.hb9bza.net/lotw/

LoTW Query by K1MU:  http://www.rickmurphy.net/lotwquery.htm

VOACAP Propagation:  http://www.voacap.com/prediction.html

NS6T's Azimuthal Map:  http://ns6t.net/azimuth/azimuth.html

Announced DX Operations:  http://www.ng3k.com/Misc/adxo.html

FCC Vanity Licensing:
 

Vanity HQ: http://www.vanityhq.com/
 

AE7Q Query Tools: http://www.ae7q.com/
 

RadioQTH: http://www.radioqth.net/
 

ARRL: http://www.arrl.org/arrlvec/vanity.html
 

FCC Practice Tests:
 

QRZ.com: http://www.qrz.com/p/testing.pl
 

AA9PW: http://www.aa9pw.com/radio/ (also a Java downloadable version)
 

eHam: http://www.eham.net/exams/
 

W8MHB: http://www.w8mhb.com/exam/
 

AFUTrainer: http://www.oliver-saal.de/software/afutrainer/
 

Google Earth:
 

Ham-Worldmap: http://www.qslnet.de/member/hb9tlk/hamweb.html
 

Munich Repeaters: Relais um München
 

German Sites:
 

amateurfunk.de: http://www.amateurfunk.de/
 

Ham Radio Board: http://www.hamradioboard.de/
 

German Callsign Lookup: http://ans.bundesnetzagentur.de/Amateurfunk/
 

German Mods & Info Site: http://www.mods-ham.com/
 

German Infos U.S.-Lizenz: http://www.us-lizenz.de/
 

Other Sites:
 

QRZ.com: http://www.qrz.com/
 

eHam: http://www.eham.net/
 

CW ring tones: http://www.planetofnoise.com/midi/morse2mid.php
 

EI8IC Maps: http://www.mapability.com/ei8ic/index.html

Operating mobile:  http://www.k0bg.com/
 

Remote control of station over the internet: http://www.telepostinc.com/n8lp.html
 

Internet Remoting Toolkit (IRB): http://w4mq.com/toolkit/index.html

RemoteRig:  http://www.remoterig.com/