JASS - (Just Another Simple Spool).

Just spool-less and/or got some of that dirt cheap filament that questionable quality-often-hails-from-a-country without-Free-speech-nor-Freedom of assembly and that filament could most likely not even handle the neighbours cat breaking wind?

Search no moar.

Licence:
Design, parts, files: GPLv3.
Pics & doc: CC-BY-SA.

Yahoodled with FreeCAD:
reprap.org/wiki/Freecad (Resources etc.)

Easy to print.
Easy to customize.
Filament req: about 80grams.

Use PLA!
Its moar awesome than any plastic you have not liberated/recycled yourself from the local dumpster.