Brigadoon - An Occasional Corner on the Internet
Jumper Block
Designed by Mark Little
One of the neat things about the jumpers that are commonly used with projects such as Arduino or the Raspberry Pi is that they are compatible with the IC sockets and posts. It is simply a matter of either plugging them into a socket or over the post.

The only real problem with them is that they do not allow leads to be piggy backed so that more than one jumper can be put on in a socket or on a pillar. The Jumper Block below solves that problem by having a jumper block with alternate strips of sockets and pillars (from A to X).
Then wires were run vertically down each column so that the corresponding pins in each row are connected together. This meant that each connection point has three (3) posts and three (3) sockets that can be used to distribute signals.