Open tools for expressive data

Cultivating data, one project at a time

yellow sunflower

yellow sunflower's aim is to encourage people to use design and storytelling in their data workflow.

We offer open source tools, with a focus on data visualization.

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Open source

Open source is at the core of yellow sunflower. All projects are released under permissive licenses and designed to be simple, useful, and easy to extend.

pypalettes python package logo
pypalettes
Data Visualization
A large (+2500) collection of color maps for Python
...
download button logo 79k
Matplotlib Color
Documentation GitHub
pyfonts python package logo
pyfonts
Data Visualization
A simple and reproducible way of using fonts in matplotlib
...
download button logo 94k
Matplotlib Fonts Reproductibility
Documentation GitHub
morethemes python package logo
morethemes
Data Visualization
More themes for matplotlib
...
download button logo 20k
Matplotlib Theme
Documentation GitHub
drawarrow python package logo
drawarrow
Data Visualization
Drawing arrows for matplotlib made easy
...
download button logo 29k
Matplotlib Arrow
Documentation GitHub
dayplot python package logo
dayplot
Data Visualization
Calendar heatmaps with matplotlib
...
download button logo 4.6k
Matplotlib Calendar Heatmap
Documentation GitHub
gifing python package logo
gifing
Image & Video
A lightweight python tool for creating GIFs
...
download button logo 0.7k
GIF Image
Documentation GitHub

learning ressources

If you're interested in learning, there are several things that can interest you here:

our services

Helping you turn data into impact, insights into action, and ideas into digital reality.

Data Visualization

Transform complex data into compelling visual stories. We create charts that are dedicated to be insightful and actionable.

Information design Storytelling Reproductibility

Automated Reporting

Streamline your reporting process with intelligent automation. We build systems that generate, format, and distribute reports automatically, saving you time and ensuring consistency and reproductibility.

Automation Integration Data

Custom solution

Tailored solutions for your unique challenges. Whether you need a specialized data pipeline, a custom dashboard, or a full end-to-end product, we design and build scalable tools that match your exact needs—combining technical precision with creative problem-solving.

Design Data Scalability

Training & Education

Empower your team with comprehensive training programs. We offer customized workshops and courses covering data analysis, visualization tools, and best practices for your industry.

Custom Workshops Hands-on Learning Ongoing Support 1:1 Coaching

next step?

If you found something that interests you here, just send an email to joseph.barbierdarnal@gmail.com and present your project. Then, we can start discussing how we can help you with your project, solutions, and pricing. You can learn more about previous clients here.

Note that since yellow sunflower is highly focused on developing open-source software, working with us will help support this by allowing more development time and enabling us to hire contractors.