Flow charts making it easy to determine which http status code to return

A web application that allows you to create and share documents that contain live code, equations, visualizations and explanatory text. Uses include: data cleaning and transformation, numerical simulation, statistical modeling, machine learning and much more. The Notebook has support for over 40 programming languages, including those popular in Data Science such as Python, R, Julia and Scala.

A Python data analysis library that is optimized for humans instead of machines.

A simple static site generator for photoessays

Helps you analyze your website speed and performance based on performance best practices and timing metrics. It collects data from multiple pages on your website, analyze them using the rules and output the result as HTML or send the metrics to Graphite.

Prevent text orphans

Adjust font size to fill a given space with text

A short introduction to scala, showing the basic language features (not as in-depth as Twitter's scala school, but perhaps a good start)

Python script to automatically download/update/compile a large set of penetration testing tools

Write API documentation in Markdown; generates nice-looking website.

Allows the injection of javascript code in arbitrary binaries. Works for applications both on the local machine as on Android and iOS.

A reverse shell similar to meterpreter, written in python

http proxy which modifies in-stream PE binaries (adds payload)

Long list of papers, blog posts, and other resources related to hardware security and hardware hacking.

An open-source operating system designed to provide strong security for desktop computing using Security by Compartmentalization

Strings potentially causing different kind of trouble (unicode multibyte characters, various injection attacks, etc.)

Twitter's collection of Scala best practices

Twitter's step-by-step introduction to the Scala language

Programming koans (exercises) introducing the Scala language

Pretty-printing library for scala - nicely formats output of (nested) lists; an alternative to the default toString method.

A collection of "how to"-recipes for undoing stuff in git

An open source load testing tool. Write your behaviour in Python. Similar to Gatling (with the exception of the recording feature).

Retrolambda lets you run Java 8 code with lambda expressions, method references and try-with-resources statements on Java 7, 6 or 5. It does this by transforming your Java 8 compiled bytecode so that it can run on an older Java runtime. After the transformation they are just a bunch of normal .class files, without any additional runtime dependencies.

Overview over the different options of the Content-Security-Policy header.

jaxb-like xml bindings for Scala, including maven and sbt support for automatically generating stubs for given xls/wsdl files.

Multi-Protocol, Multi-Language Test Foubles Over the Wire See also https://blog.codecentric.de/2015/06/mock-server-betrieben-mit-mountebank-und-docker/

Pacto helps you test consumers by both validating and stubbing services. Vice versa, Pacto will test the provider implementation and make sure it complies with the same contract used to stub the service for consumers.

Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

A beautiful-looking LaTeX template for thesis documents (and the like)

Links to resources to different areas of programming language theory (ordered by ease to understand)

The Polymer library is designed to make it easier and faster for developers to create great, reusable components for the modern web. With custom elements, you can extend the vocabulary of HTML with your own elements.

Lifts Facebook's React library into Scala.js and endeavours to make it as type-safe and Scala-friendly as possible. Provides (opt-in) support for pure functional programming, using Scalaz and Monocle. Comes utility modules helpful for React in Scala(.js), rather than React in JS.Includes a router, testing utils, performance utils, more. See also https://github.com/payalabs/scalajs-react-bridge

A series of posts about the linux kernel and its insides; for people who are interested in the linux kernel internals and other low-level subject matter.

Collection of cheat sheets for your frontend development needs & reference

A BibTeX database containing papers related to Cryptography, with manually checked entries and uniform BibTeX data.

xsv is a command line program for indexing, slicing, analyzing, splitting and joining CSV files. Commands should be simple, fast and composable.

Testing and validating REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.

pfff is a set of tools and APIs to perform some static analysis (e.g. to find bugs), dynamic analysis, source code indexing, code search, code visualizations, code navigations, or style-preserving source-to-source transformations such as refactorings on source code.

Facebook Infer is a static analysis tool - if you give Infer some Objective-C, Java, or C code, it produces a list of potential bugs.

Different memory problems with java, the corresponding typical error messages, and possible causes.

Hand-selected link list to free design resources (fonts, photos, etc.)

Lots of read-worthy computer science documents, managed in a git annex repo

Tutorial for cats, a functional library (and an alternative to scalaz) for scala

Great wrap-up of modern CSS writing techniques.

scodec is a suite of Scala libraries for working with binary data. Support ranges from simple, performant data structures for working with bits and bytes to streaming encoding and decoding.

The New (Definitive) System Troubleshooting Tool. Capture system state and activity from a running Linux instance, then save, filter and analyze. Think of it as strace + tcpdump + lsof + awesome sauce. With a little Lua cherry on top.

An Open Source HTML5 and Javascript game engine. Deploys games to web, and mobile apps.

Guide to using dependency injection in Scala, mainly using MacWire, but introducing different approaches as well.

An open-source, distributed, time series database with no external dependencies.

A Distributed, Scalable Monitoring System. Based on hbase and cassandra.

KairosDB is a fast distributed scalable time series database written on top of Cassandra.

Real-time Exploratory Analytics on Large Datasets

Simulates slow/unreliable network connections by trafficshaping an actual network interface. Great for testing the behaviour of an application under bad network conditions.

Library with handy tools for pentesting / ctf contests (look at the write-ups repo for examples).