Lines of Lore:
Determines the number of lines of lore on an item
Code:

Spoiler: Code

Code (Skript):

1. function GetLoreSize(Item: item) :: integer :
2.     set {_Lore::*} to lines of lore of {_Item} split at "||"
3.     return size of {_Lore::*}
4.    

Usage:

Spoiler: Usage

Code (Skript):

1. GetLoreSize(player's tool)

Will return an integer value

Empty Slots:
Determines the number of empty slots for any given range of slots in a player's inventory
Code:

Spoiler: Code

Code (Skript):

1. function GetEmptySlots(player: player, num1: integer, num2: integer):: integer :
2.     set {_EmptySlots} to 0
3.     loop integers between {_num1} and {_num2}:
4.         if slot loop-value of {_player}'s inventory is air:
5.             add 1 to {_EmptySlots}
6.     return {_EmptySlots}

Usage:

Spoiler: Usage

Code (Skript):

1. GetEmptySlots(player, 0, 36)

This checks the whole inventory of the player

Set Slots:
Determines the number of set slots for any given range of slots in a player's inventory
Code:

Spoiler: Code

Code (Skript):

1. function GetSetSlots(player: player, num1: integer, num2: integer):: integer :
2.     set {_SetSlots} to 0
3.     loop integers between {_num1} and {_num2}:
4.         if slot loop-value of {_player}'s inventory isn't air:
5.             add 1 to {_SetSlots}
6.     return {_SetSlots}

Usage:

Spoiler: Usage

Code (Skript):

1. GetSetSlots(player, 0, 36)

Simple Replacement:
Replaces specified blocks in given radius to any block
Code:

Spoiler: Code

Code (Skript):

1. Function Replace(Player: player, Radius: integer, Replace: block, With: block):
2.     loop blocks in radius {_Radius} of {_Player}:
3.         if loop-block = {_Replace}:
4.             set loop-block to {_With}
5.  

Usage:

Spoiler: Usage

Code (Skript):

1. Replace(player, 5, sand, dirt)

Replaces all sand blocks in a radius 5 to Dirt