Fences are supposed to keep the animals out, not the player! The Fence Jumper mod by username TheRealP455w0rd makes a simple change to how fences work.
What is the Mod About?
The mod changes how the fences work by allowing players to jump over the fences simply by just pressing the jump button. This removes the need for pesky carpets, trap doors, or jump boosts. The change only affects players and does not affect mobs and animals.
Should You Install it?
The mod is good when playing in single-player mode or LAN; however, using this mod on servers is not recommended, as other players can abuse the ability easily.