Opensource (MIT-licensed) multi-platform game engine (2d and 3d)

Overview of different NoSQL systems, assigned to the subset of CAP they fulfill.

Scala mocking framework, with integration to specs2 and ScalaTest.

Online code review tool (now opensourced)

A guide for a modern development/deployment stack (distributed development stack (DDS)). Lists technologies for version control, automated testing, continuous integration and -deployment, and automatic provisioning/cloud deployment.

I/O library for writing asynchronous, boilerplate-free services. Abstraction from raw network I/O via protocol decoder (not only http, but several protocols - extensible via own implementations) to the actual service implementation.

A library built on top of D3 that is optimized for visualizing and laying out time-series data. It provides a simple way to produce common types of graphics in a principled, consistent and responsive way.

Opensource toolchain for embedded hardware security research including side-channel power analysis and glitching.

Scriptable reverse engineering framework

Library (Javascript, Java, C++) for parsing, formatting, storing, and validating international phone numbers.

Configure consistent coding style across different editors and IDEs. Accomplished by a series of plugins for several editors and IDEs which parse a common config file.

Blog with great technical articles on elasticsearch.

Parser for multiple programming languages to a language-independent format. Useful e.g. for IDE development.

An awesome-looking, opensource Elite clone

A modular web console for managing your Java stuff

Dashboards For the Internet Of Things (and almost anything else)

An advanced memory forensics framework

Python tools for analyzing memory dumps of several OSses

Collaborative spreadsheet editor - the Etherpad for spreadsheets

List of opensource sysadmin tools/resources

Real-time charting library (based on d3js)

Telnet-like php shell

Create interactive (javascript-powered) stories

Great write-up on how to design a web api

A cygwin distribution with its own command-line packet manager. Installation without root and with a single download.

Tool for tracing and benchmarking processes in an actor system.

jquery-based web editor. Image drag-and-drop, "menu on text selection" as an option. Professional use requires purchase of a license.

Multibrowser JS editor, API prepared for multiuser (pad-like usage), image inclusion via drag-and-drop

Display blocks of information in multiple columns; can react responsively to screen size; small footprint.

http request builder suitable for web api testing

CSS tutorial, source on github

General purpose dashboard replacement for Graphite

High quality conversions of several free fonts to WOFF format

Visualizing Git Concepts with D3

A primer on the basics typography and page layout. Condensed information, very useful.

Self-hosted performance monitor for website performance. Data delivered by actual web browsers, a small piece of JS sends the measurements to the server.

Comparison of several Scala libraries for database access, with examples for mapping, inserting, and querying.

A tool for editing version-control repository history. reposurgeon enables risky operations that version-control systems don't want to let you do, such as editing past comments and metadata and removing commits. It works with any version control system that can export and import git fast-import streams, including git, hg, bzr, CVS, and RCS. It can also read Subversion dump files directly and can thus be used to script production of very high-quality conversions from Subversion to any supported DVCS.

Sigma is a JavaScript library dedicated to graph drawing. It makes easy to publish networks on Web pages, and allows developers to integrate network exploration in rich Web applications.

Phabricator, an open source software engineering platform Phabricator is a collection of open source web applications that help software companies build better software.

Online mind map editor. MIT-licensed.

A JavaScript library for building user interfaces; similar goal as angular.js. According to http://www.mariussoutier.com/blog/2014/01/20/ping-conference-play-edition-day-1 it is faster than angular.js and harmonises better with scala.js (avoids mutable structures but works on data streams)