I suggest Inkscape, an open source vector graphics software

Many great suggestions regarding software solutions you will find in this post:

https://www.researchgate.net/post/Best-graphics-program-for-making-scientific-illustrations-for-journal-articles

Next, perhaps you can try Veusz - a scientific plotting and graphing program with a graphical user interface, designed to produce publication-ready 2D and 3D plots. Veusz is Free Software: https://veusz.github.io/

You can create graphical abstracts and figures by using biorender software.

Link for the same is https://biorender.com/

Hi, Vishesh Bhadariya!

I would recommend Mind the Graph (mindthegraph.com)! The main advantage is the huge library of scientific illustrations.