MelonLib is a multipurpose Garry's Mod development library that includes a plethora of different utilities.

Documentation can be found above the function declarations, formal documentation is coming soon:tm:

Includes

• Tons of development utilities
  • Panel Debugger
  • Meta-File Interfacing
  • Function Attribute System
  • Message Logger
• Advanced String Formatting with Filters
• Font System
• Color Manipulation Functions
• Image/Material Caching and Downloading Handler
• Complete Module Loading System
• Many third-party libraries
  • Material Avatar
  • Circles!
  • UI3d2d
• And lots more little utilities!

Examples

String Formatting System:

melon.string.print("Did you know that {name | capitalize()} are {adjective}?", {
    name = "you",
    adjective = "bald"
})
-- Did you know that You are bald?

melon.string.print("you are {1}, {2} and {3.1}", 
"fat", 
"weird", 
{
    "smelly"
})
-- you are fat, weird and smelly

melon.string.print("Blah blah blah {1:Nick|call($1)}", LocalPlayer())
-- Blah blah blah Melon

Font System:

draw.Text({
    text = "Some Text",
    pos = {},

    -- Creates and returns a 25px font
    font = melon.Font(25)
})

Image/Material System:

surface.SetMaterial(
    -- Caches material automatically
    melon.Material("icon16/user.png", "smooth") 
)

surface.SetMaterial(
    -- Downloads and returns inline
    melon.Image("https://i.imgur.com/xYWFeyG.jpg")
)