Redstone Quill

Redstone Quill is a fork of the abandoned Redstone Pen, removing all items and system with the exception of the Redstone Quill, that lets you draw more optimized redstone in your world, including on walls, and adding Jade support so you can see your redstone track power levels!

From the original description:

Redstone Quill

• Craft and use it to draw or remove thin Redstone Tracks.
• Multiple independent tracks through one block space are possible.
• The Redstone Quill uses Redstone dust directly from your inventory.
• Doesn't destroy blocks when left-clicking, except blocks with no hardness (like grass, repeaters, or comparators).