Are there specific plugins and scripts for creating logos?
There really is no automated way of creating a logo. You should attend a class or view tutorials on what makes a good logo. Logos need to be simple, be original, be appropriate for your brand or organization, be scalable (large or small). Then they need to be developed through sketching ideas and refined. Finally sketches need to be turned into vector art with Illustrator's drawing tools.
There are no plug-ins or scripts which could do all these things.
Not only does a logo need to be appropriate to the business or organization, but it also must function effectively in various environments where it may potentially be viewed -various kinds of electronic screens or anything from a business card to a high rise pylon sign. Every business or organization has different needs and the brand identity must be tailored to that. Every medium where the logo would be reproduced (in print, on electronic screens or outdoors on signs and billboards) has issues to consider like color and material standards or limitations in those mediums. The process may be somewhat simple for a small business with one shop. Creating a new brand identity for a large organization can be a really big project.
Having taught the process of creating logos to adult students in a graphic design program, I don't believe any automated process like that will produce a good, appropriate and original logo.
me neither, but since the OP is brave enough to consider automatic logo creation I just replied.
Wait. Logo generators are pretty rubbish now but it’s only a matter of time till someone who understands graphic design properly trains a GPT-3 network on everything from Saul Bass onwards and sets it loose on the world. For a lot of small businesses and sole traders who just want something to stick on their Etsy storefront and business cards, fast, cheap, and just good enough will do nicely, thankyouverymuch.
(You don’t even need an online generator if you already have Illustrator. Adobe’s stock library has a respectable selection of vector logo designs if OP is just looking for something to slap a company name into and apply an appropriate color scheme for the business. Less is more, KISS.)
I'm not talking about tools that make a logo, but tools to make a logo.
as tools: gradient, fillet, etc...
You mean tools inside Illustrator?
Depending on how you want the logo to look, pretty much any tool can be used. Maybe excluding the graph tools, but who knows what people design.
If you're looking for the tools to make a logo, you're starting in the right place if you learn to use Illustrator well. Asking questions in this forum is a good place to start! In Illustrator, choose Help > Tutorials for some beginning tutorials for learning the tools you would use to make a logo:
Illustrator gives you all the tools you will need. You probably won't need to get plug-ins or scripts.
When brainstorming ideas, I'd also suggest sketching "quick and dirty" rough concepts on paper. As the ideas start to gel those sketches can be brought into the computer (using a flatbed scanner or even a phone; it doesn't have to be perfect). The rough sketches can be locked down in one layer within Adobe Illustrator for clean, precise artwork to be created over the top of it on another layer. The iPad and Apple Pencil is great for doing a lot of rough sketching work directly into a computing environment.
You have to understand how confusing is your request to us. Illustrator does provide all the creation tools at hand. Scripts bring automation so the fact that you ask for them throws the question of the automated processes you are looking for. You may want to save time by avoiding repeating the same tasks over and over.
If so, actions can help, graphic styles can help, and cleaning features can help. At this stage, it's complicated to help you better than that but if you provide more details, maybe we can help better.
“You have to understand how confusing is your request to us. Illustrator does provide all the creation tools at hand.”
^^^ This 100%. As a tool, Illustrator is more than sufficient for creating logo artworks.
What Illustrator won’t do is design good logos. OP has to learn how do that for themselves. That means learning basic graphic design principles (typography, color theory, grid layout, etc); studying existing logos to understand what makes them good or bad; and then practice, practice, practice.
Since OP talks about “gradient, fillet, etc,” I can’t help but remember this horror, so will repeat just what I said there. Here’s a couple good logo design how-tos:
And here’s a good how-not-to, as understanding what makes a logo design bad is also important: