Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.

A lightweight, open source, tracking-free comment engine alternative to Disqus.

A modern CSS framework based on Flexbox

Slate is a completely customizable framework for building rich text editors.

Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Canvas—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity.

A command-line tool for working with Architecture Decision Records (ADRs).

Have fun with friends, schoolmates or co-workers on multiplayer programming games and show them who's the boss!
Join our international online programming contests for fun, prizes or glory.
Hit the Leaderboard and get recognition from your peers.

Machine Learning in Python

Simple and efficient tools for data mining and data analysis
Accessible to everybody, and reusable in various contexts
Built on NumPy, SciPy, and matplotlib
Open source, commercially usable - BSD license

Speech and natural language tools

Use webtask for …
Serverless Applications

Run server-side code for your JavaScript and native applications. Just worry about your code.
Programmable Webhooks

Run code on each Stripe Payment, a GitHub Push, or any webhook, without setting up servers.
Multi Tenant Sandbox

Allow your customers to extend your product using Node.js code instead of creating your own DSL.

Scuttlebot is an open source peer-to-peer log store used as a database, identity provider, and messaging system. It has:

Global replication
File-synchronization
End-to-end encryption

Top-like interface for container metrics

ctop provides a concise and condensed overview of real-time metrics for multiple container

Open source machine learning tools for developers and product teams to expand bots beyond answering simple questions.

Rasa Core's primary purpose is to help you build contextual, layered conversations with lots of back-and-forth. To have a real conversation, you need to have some memory and build on things that were said earlier. Rasa Core lets you do that in a scalable way.

RASA NLU is an open-source tool for intent classification and entity extraction. You can think of it as a set of high level APIs for building your own language parser using existing NLP and ML libraries.

Botpress is an open-source bot creation tool written in Javascript. It is powered by a rich set of open-source modules built by the community. We like to say that Botpress is like the Wordpress of Chatbots; anyone can create and reuse other people's modules.

CodeScene identifies patterns in the evolution of your code. This gives you the power to predict its future and to find the code that is hard to evolve and prone to defects. The investigation takes only minutes but saves you from future limitations, bottlenecks or maintenance issues.

CodeScene gives you a better understanding of your software systems. Here are just a few of all the questions that CodeScene will help you find answers to:

Which part of the code might become productivity bottlenecks?
Which parts of the code will be hard to maintain?
What is the technical risk when a key developer leaves the project?
Which parts of the code should we improve to get a real productivity and quality gain?
How is the knowledge distribution between teams in your codebase?

With API.AI, you can create conversational scenarios within minutes, then build advanced dialogues to manage the conversation flow with the user. Once you build your agent, you can integrate it with SDKs or use our one-click integration modules. When your product is launched, it constantly improves with machine learning and can be updated in real-time based on user interactions.

Activities and ideas for making agile retrospectives more engaging

Fractal is a tool to help you build and document web component libraries, and then integrate them into your projects.

Component (or pattern) libraries are a way of designing and building websites in a modular fashion, breaking up the UI into small, reusable chunks that can then later be assembled in a variety of ways to build anything from larger components right up to whole pages.

Fractal helps you assemble, preview and document website component libraries, and then integrate them into your web sites, apps and build processes to create joined up, ‘living’ projects.

Fractal can be run from the command line or integrated into your project via its API.

A source-control branching model, where developers collaborate on code in a single branch called ‘trunk’ *, resist any pressure to create other long-lived development branches by employing documented techniques, avoid merge hell, do not break the build, and live happily ever after.

Warning: You are entering the XSS game area.

Curated list of best tools for launching your website. Find how to get the best hosting, cheapest domain, files storage, monitoring and more.