Snow Rider:

First 2 weeks, MatrixDodge - Shift makes the game slow down.

First month, OmniClock - also slows the game down (better than MatrixDodge).

First 2 months, MoonJump - super high jumps (JUMP OVER TREES!).

First 6 months, Infinite gifts - crazy (buy every-sled).

EaglerCraft 1.8.8

First 2 weeks, Island survival seed

First month, Nether Portal seed

First 2 months, Full diamond armor seed

First 6 months, Full diamond armor, tools, nether portal, 16 eyes of ender

For EaglerCraft 1.8.8 you can also ask for custom seeds