Play with Docker

PWD is a Docker playground which allows users to run Docker commands in a matter of seconds. It gives the experience of having a free Alpine Linux Virtual Machine in browser, where you can build and run Docker containers and even create clusters in Docker Swarm Mode.

The 'daddy' of


Play with Kubernetes

PWK is a K8s playground which allows users to run K8s clusters in a matter of seconds. It gives the experience of having a free Alpine Linux Virtual Machine in browser. Under the hood Docker-in-Docker (DinD) is used to give the effect of multiple VMs/PCs.


Puppet Validator

Paste Puppet code into the textbox and check it for validity.


Prettier · Opinionated Code Formatter

Supports many languages. Integrates with most editors. Has few options.



Compute various size metrics for a Git repository, flagging those that might cause problems


technosophos/dashing: A Dash Generator Script for Any HTML

Dashing is a general purpose tool for starting with some HTML documentation and generating Dash documentation. Dashing uses CSS3 selectors to tag an HTML document for import into Dash. It generates a complete docset for you.


Git Large File Storage

Git Large File Storage (LFS) replaces large files such as audio samples, videos, datasets, and graphics with text pointers inside Git, while storing the file contents on a remote server like or GitHub Enterprise.

Sounds useful, although I don't normally store large binaries inside git repos.


Morris Jobke: My git config

Because I get quite often asked about my git config I will post it here and leave some notes.


Storage Performance Council Benchmarks

SPC Results provide a source of comparative storage performance information that is objective, relevant, and verifiable. That information will provide value throughout the storage product lifecycle, which includes development of product requirements, product implementation, performance tuning, capacity planning, market positioning, and purchase evaluations.


Jerakia - A versatile data lookup system

Jerakia is a tool that performs key value lookups against a variety of pluggable data stores. It does this using a top-down hierarchical set of queries that allow you to define global values and override them at different levels of a configurable hierarchy.


Micrometer Application Monitoring

Micrometer provides a simple facade over the instrumentation clients for the most popular monitoring systems, allowing you to instrument your JVM-based application code without vendor lock-in. Think SLF4J, but for metrics.



The Simple Logging Facade for Java (SLF4J) serves as a simple facade or abstraction for various logging frameworks (e.g. java.util.logging, logback, log4j) allowing the end user to plug in the desired logging framework at deployment time.


Listen Tracker - Tracking for Spotify Connect

Track your playback from all your Spotify (unofficial) Connect devices to without having to set it up on every device.

As the public version seems to be at its user limit, I guess I have to run my own instance here. Fortunately, the script is available and I already started to hack together a Docker container to host a running instance of the script. Check the development at


The Top 50 Developer Tools of 2017

This is your one-stop resource for developer tools, with a wrap up of what was hot in 2017 and what to be on the lookout for in 2018.

There's some interesting stuff to be found in here.



Front End Developer Playground & Code Editor in the Browser


WPO Stats

Case studies and experiments demonstrating the impact of web performance optimization (WPO) on user experience and business metrics.

If you have to tell your manager why you want to optimize the speed of your site.


Responsive Image Breakpoints Generator by Cloudinary

Easily generate the optimal responsive image dimensions. One image for all screen resolutions and different devices is not enough. An image per pixel is too much - so how can someone automatically choose the optimal responsive image sizes?


Sonarwhal, a linting tool for the web

Build better web sites - lint the web forward.


Marcy Sutton: Radically Accessible Internet Applications

Marcy Suttons talk from beyond tellerrand Munich 2017.



Website Speed Test and Quality Check