what are plug-ins?
"Plug-in" is a software that interacts with a host application to provide a certain function. You can add the functions what you want to the host application by using Plug-in Softwares.

If you want to use a particular logo mark in the different Illustrator documents.
By using DB Palette, you can just one click to register the images and just drag and drop for using it in any Illustrator documents. DB Palette
If you want to make Barcode and QR code in Illustrator.
If you use "Serial Barcode" and "AI2DCode-Pro", it will be very easy to make Barcode and QR code. Also you can edit them in Illustrator.
Serial Barcode / AI2DCode-Pro <Japanese version only>
The English language version of theses softwares are not available at the moment. Please refer to the Japanese page or contact us directly for the products.
If you want to use Illustrator as CAD tools.
Adobe Illustrator becomes powerful 2D-CAD to be added 8 kinds and 17 pieces of highly functional tools. Also, you can converts the format of documents from "ai." to "dxf" and "dxf" to "ai."
BPT-PRO
EXDXF-PRO
You can try BABY UNIVERSE Plug-in software by downloading demo.