just for the fun of it, ill post some mods, but ull need to look them up urself, and i will not help out with installation
reis minimap (useful tool)
backtools (just looks nice)
optifine (speed as well as patcher)
not enough items (set this on utility mode or recipe)
there are always more mods to find and i can never list all the good ones, but as a general rule, any tool that does not change gameplay and dosent change screen render in a cheaty way is allowed and even encouraged