Knowledge Sharer

 Was originally meant to be part of TGILibrary, but was asked to make a separate mod so other packs can take advantage of it, as not everyone uses Thaumic Tinkerer:

In order to share your progression with others, you and the target player need to both have Thaumonomicon in your main hand. The person sharing the progression right clicks on the target, and a message will be sent when the sync is complete.

If for some reason the reverse happens, target player's knowledge will not be erased or set to the initiator's progression.