Marble is a small mod all about decoration and little useful things. The theme of the mod is highly similar to vanilla Minecraft, so it doesn't add any overcomplicated things.

Here you can see all the blocks and items:

From left to right:

Multiocolor Stained Glass
Tall Torch - essentially a 1.5 block torch, for those of you who hate torches on the floor
Null Block (the texture is intended) - a request by my friend
Hardened Clay Brick
Stained Clay Bricks of all 16 colors
Rope (allows you to climb down faster than falling, shift to slow down)
Enchanted Rope (allows you to climb up faster than a ladder)
Multicolor Stained Glass Panes

Items:

Apple Pie - for those of you who have automated farms that produce thousands of apples
Golden Apple Pie - has nothing to do with my name, I swear
Belly Emptinizator Pills 3000 - you can eat them at any time and they remove hunger points instead of filling them.

Miscellaneous features:

The Withering enchantment. You can't get it through ordinary enchanting - you have to get the books from Wither Skeletons or the Wither himself. When applied to a sword, it'll give a Wither effect to attacked enemies (duuh).
The ability to turn signed Written Books back into unsigned Writable Books. All the text is saved in the process.

Right now it's in very early beta, only about 1/3 of all planned features are implemented.