Image generation

Free web-based resources which can be used to generate images for scientific publications:

1. BioRender: BioRender is a web-based tool that allows you to create professional-quality scientific figures and illustrations. It has a library of over 50,000 icons and templates that you can use to create images in a variety of fields, including biology, chemistry, and physics. While BioRender offers a paid version, it also has a free version with limited features.
2. Canva: Canva is a web-based design tool that can be used to create a wide range of images, including scientific figures and illustrations. It has a variety of templates and tools that can help you create professional-quality images, even if you have little to no design experience. While Canva offers a paid version, it also has a free version with limited features.
3. Google Drawings: Google Drawings is a free web-based tool that allows you to create diagrams, flowcharts, and other types of scientific figures. It has a variety of built-in shapes and objects that you can use to create your images, as well as the ability to import images and add text. Google Drawings is part of the Google Suite of tools, so you will need a Google account to use it.
4. Lucidchart: Lucidchart is a web-based tool that can be used to create diagrams, flowcharts, and other types of scientific figures. It has a drag-and-drop interface and a variety of templates and shapes that can help you create professional-quality images. While Lucidchart offers a paid version, it also has a free version with limited features.
5. Cacoo: Cacoo is a web-based tool that allows you to create diagrams, flowcharts, and other types of scientific figures. It has a variety of built-in shapes and objects that you can use to create your images, as well as the ability to import images and add text. While Cacoo offers a paid version, it also has a free version with limited features.

Besides these the following can also be used:

1. Inkscape: Inkscape is a free, open-source vector graphics editor that can be used to create and edit scientific diagrams and figures. It has a user-friendly interface and a variety of tools that can help you create professional-quality images.
2. GIMP: GIMP is a free, open-source image editor that can be used for a wide range of image editing tasks, including creating and editing scientific images. It has a large community of users and developers, so there are plenty of resources available to help you learn how to use it.
3. Pencil Project: Pencil Project is a free, open-source prototyping tool that can be used to create diagrams, flowcharts, and other types of scientific figures. It has a simple, intuitive interface and a variety of built-in shapes and objects that you can use to create your images.

If you know of any other options do post the details in the comments section.