I have started to use TexStudio for making my documents in LaTeX (beginner mode, by the way); and I was wondering if there is any software that allows to make graphs so they can be transformed directly to LaTeX. I mean not necessary plots, but like a sort of Paint so that I can export the graphs to LaTeX, if they are TexStudio plugins would be great.
2 Answers
I guess there is not a single answer to your question. It probably depends on what people are used to use. Personally, I think Inkscape (link) is the way to go, since it is Open Source and works on any Operating System, but any other vector graphics editor like Adobe Illustrator works as well.
With Inkscape you can export your drawings directly in pdf format, cropped to the size of the drawing and chose to omit the text in the pdf and create a LaTeX file that you can compile separately to add text, change size, include formulas, and so on. The output is also a pdf that you simply include as a graphic: \includegraphics[scale=1]{MyPath/MyFigure}.
Otherwise, you can have a look at the overpic package, which I find extremely useful to add text on top of a figure.
IPE has excellent TeX integration. It provides many of the standard drawing tools, and all text is rendered through TeX.
tikz, it is well worth learninginkscape2tikz. There are some other tools that can generate TikZ code, see texample.net/tikz/resourcesTikZcode to put in yourLaTeXdocument.