Glamorous Toolkit is now beta. Read more.

Glamorous Toolkit is the moldable development environment. It is a live notebook. It is a flexible search interface. It is a fancy code editor. It is a software analysis platform. It is a data visualization engine. All in one. And it is free and open-source under the MIT license.

Code reading reimagined

Yes, code reading. Developers spend 50% or more of their time doing just that. It's the single most expensive activity in software development. We reimagine it from the ground up, and with it we reshape the whole development experience.

We call it moldable development.

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What's it good for?

Glamorous Toolkit can be molded in many ways to support a variety of situations and enable a new kind of development.

Use case

Executable specifications

Specifications tend to get a bad name because they are expensive and often wrong. There is a better way. Model them explicitly. Explore scenarios through executable examples. View the results through custom views.

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Explaining a domain with live documents.

Use case

Software assessment

Code reading is the single most expensive development activity. Much of reading is actually about finding interesting places. Finding the root cause, finding where to add a new feature. Those are search activities. Or visualization ones.

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An example of using an interactive analysis for assessing which deprecated classes can be removed from a Java system.

Use case

Iterative API & data exploration

To reason about data, we first need to qualitatively understand its structure. The inspection tools together with the ability of refining the data model and of visualizing in place are directly usable in these contexts.

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A case of exploring a database, querying with SQL, and then visualizing the result. Seamlessly.

Use case

Pharo development

Glamorous Toolkit is implemented in Pharo, the pure object-oriented language. Of course, it brings a moldable environment for developers working with Pharo. And yes, Glamorous Toolkit is developed using Glamorous Toolkit, too.

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Exploring a Pharo algorithm based on Tensorflow.

A novel development experience

Glamorous Toolkit is implemented in Pharo, but it's made to work for many languages.

For every development situation, we want the environment to present it contextually and when it does not, we mold it. Live. This seemingly small change is transformational and can be utilized in many ways.



Every part can be molded to the context. Every object can specify how it can be viewed or searched. Every method can specify how it can be edited. Every exception can define how it can be debugged. And all can be molded directly from the environment, often in minutes.


Exploratory flow

Understanding software requires continuous exploration. We capture that flow explicitly. In true moldable fashion, each step can be adapted dynamically. Together with the various tools this leads to an ever extensible experience.



Live programming is programning in the presence of living objects. It can start with a code snippet. Or with a form. Or another visual that creates the living objects.


On demand editors

We have a beautifully flexible editor. You just do not have go to it. The editor comes to you. You get to code, but you can do that after you find the right place.



Writing and consuming documentation must be enjoyable. And maintainable. So, we made the whole environment host a giant interactive, visual wiki.


Analyses for many languages

Parsing a new language. Querying and visualizing code. Connecting sources from different languages like Java, JavaScript, TypeScript, JSX, C# or Delphi. Or perhaps integrating that XML descriptor file. They are all accessible.



Examples are like tests that return an object. A small change that impacts how we compose examples, how we use them to guide development, and how, when combined with interactive narratives, we can explain our systems.


One rendering tree

Ok, this is rather ... geeky, but we are really proud of how we draw all scenes through exactly one rendering tree. That includes the editor or visualizations. We built a whole new graphical stack to make this possible. And now we can build new interesting visualizations and interactions.

Who is it for?

For developers

Moldable development is a new way to approach programming: developers build custom tools for, ideally, each of their problems. This requires new skills. Glamorous Toolkit is a platform through which you can learn and practice those skills.

For managers

Systems must not remain black boxes. They can be made explainable. For non-technical people, too. This has implications on how you can make decisions and how you can allocate and attract budgets.

For researchers

Moldable development opens a new research space and Glamorous Toolkit is an engineered platform on top of which this new space can be explored inexpensively.

For teachers

Glamorous Toolkit was first conceived to explain the inside of systems. Through custom tools people can form better mental models about the underlying system. We later learnt that teaching programming faces the same class of problem. Glamorous Toolkit can provide the basis for creating dedicated teaching environments.

We are still documenting both moldable development and Glamorous Toolkit. In the meantime, if you want to learn more, please do contact us.

Want to learn more? Contact us