Transformers Fanfics, Essays, Author Interviews and More...! Established 1996!
Before anyone says, I know T-AI is not a robot (but she's not human either) and thus shouldn't be included in this list of TF Mods. But she is the RID Autobot's main computer system, she is a major character in the series and I think she does deserve to included on the list.
The name T-AI is pronouced 'tie' and stands for Tactical Artificial Intelligence (as said in the chapter title). She's an advanced computer that displays emotions, self-awareness and a sense of humor, she appears as hologram of a human girl.
The Mod itself wasn't hard to create, in fact it was the easiest Mod I've done in a while.