ConfigCat is a developer-centric feature flag service with unlimited team size, awesome support, and a reasonable price tag.

using freemium

logstash is a tool for managing events and logs.

using

Elasticsearch is an open source, distributed, RESTful search engine.

using

Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.

using

Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

using freemium $12.5 / Monthly (Per user - Business Class)

AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.

using

A high performance free open source web server powering busiest sites on the Internet.

using Open Source

Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.

using

GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.

using Open Source

Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.

using Open Source

Android development environment based on IntelliJ IDEA

using

Bower is a package manager for the web.

using Open Source

Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.

using

Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.

using

Selenium IDE is a Firefox add-on that records clicks, typing, and other actions to make a test, which you can play back in the browser.

using

Easily visualize data pushed into Elasticsearch from Logstash, es-hadoop or 3rd party technologies...

using

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

using Open Source

From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

using

The smartest JavaScript IDE

using

With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.

using paid Free Trial $164.45 / Annually (Starter)