Planets Nu Tools

Player Info

http://plato.d10.is/planets/loaduser.php

VGA Planets Calculator

   Waypoint distance & travel time
   Movement next-turn destination
   Movement speed with damage
   Ion Storms
   Minefields
       Minefield Decay
   Planet Structures
   Planet and/or Starbase Defense & Combat Strength
   Ground Combat
   Colonist / Native tax, happiness, growth & death
   Growth table for planet temperature and race abilities

http://www.vgaplanets.ca/vgapcalc.php

Shipyard

Can be used to find out what other are building via the military score.
http://onebit.ca/cgi-bin/vgaplanets.py/Shipyard

Starbase Resources

http://onebit.ca/cgi-bin/vgaplanets.py/Starbase_Resources

Fighters In Space

http://onebit.ca/cgi-bin/vgaplanets.py/Fighters_In_Space

Torpedos In Space

http://onebit.ca/cgi-bin/vgaplanets.py/Torpedos_In_Space

Survival rate through minefields v1.2

http://thales.math.uqam.ca/~tremblayj/planets.nu/minefields.html

Tool to plan multiple overlapping minefields

Shotgun maneuver v1.2

Battle Simulator

PlanetsCentral

Nu Campaign tool

http://planets.nu/_library/campaignsim/index.htm

Ion Storm Navigator

Marklein's Ion Storm Navigator

Intercept Escape Points

Then there is this excel-sheet by mjs68508 that helps to calculate "intercept escape points":
http://www.rainbownerd.com/vgap/VGAPEscapePoints.zip

Same thing is very well documented at: http://www.phost.de/~stefan/movement.html

Related discussion:
http://planets.nu/discussion/bug-with-intercept-movement-due-to-rounding-in-game-67726

PBP Reference Doc

http://planets.nu/_library/2012/9/priority_points.pdf

http://www.planetsmagazine.com/PlanetsPedia/priority-build-points-regular-ships/