I made a little "mod" that I have wanted in the game for a while now: Planet Wiki, a KSPedia-based mini-wiki that contains useful information regarding the planets such as science multipliers in different situations and the border between "In Space High" and "In Space Low." The kind of stuff you normally have to go to the KSP wiki to find. Here are its pages:
So far the pages are populated with the following information:
A picture of the planet
Pictures of the planet's parent body and moons
The planet's in-game description
The science multiplier in different situations at the planet
The altitude border between different situations at the planet
Orbital Period
The planet's orbital inclination
Semi-major axis needed for synchronous orbit
The phase angle for optimal transfer
delta-v needed to (safely) get to the surface from Kerbin's surface
delta-v needed to land/take off
delta-v needed to escape
Surface gravity in g's
Height of the atmosphere
Number of biomes
The highest and lowest point on the surface, with their coordinates
The Sidereal day length
Efficiency of solar panels on planet's surface (as opposed to Kerbin's surface)
Minimum and maximum distances that the planets can be from Kerbin
Radius of Each body.
(Moons are included, too!)
Advice on the actual design is something I'd be grateful for, since I don't want this to look like an unreadable mess. Please post any ideas below for information you sometimes need to know for your missions that isn't easily accessible/not available in the stock game. All suggestions are welcome!