Here are a couple of tools, useful for a web based ecosystem.
Papetrailapp
Site: https://papertrailapp.com/
Description: Web log management service.
Librato
Site: https://metrics.librato.com/about
Description: Log metrics collection and visualisation service.
Newrelic
Site: http://newrelic.com/
Description: Web application profiling service (works well with PHP and Node.JS).
Log4php
Site: http://logging.apache.org/log4php/
Description: PHP logging framework – has a JS sibling, named log4js.
Phing
Site: http://www.phing.info/
Description: PHP project / system build tool.
Jenkins
Site: http://jenkins-ci.org/content/about-jenkins-ci
Description: Continuous integration server.
Phabricator
Site: http://phabricator.org/
Description: Open source “software engineering platform”, offering VCS repository management (subversion, git or mercurial), code review tool, task management, issue tracking and others.
Gitlab
Site: https://www.gitlab.com/
Description: Open source git repository management – much like github.
Cucumber
Site: http://cukes.info/
Description: BDD framework.
Mocha
Site: http://visionmedia.github.io/mocha/
Description: JavaScript test framework.
Supertest
Site: https://github.com/visionmedia/supertest
Description: Node.JS HTTP testing framework – useful for system tests.
Chai
Site: http://chaijs.com/
Description: JavaScript BDD / TDD assertion framework.
Puppet
Site: http://puppetlabs.com/
Description: Automated IT management system.
Capistrano
Site: https://github.com/capistrano/capistrano
Description: Multi system automation tool.
Trello
Site: https://trello.com/
Description: Web organiser – useful for Agile teams.
Serverdensity
Site: https://www.serverdensity.com/
Description: Server monitoring tool.
Optimizely
Site: https://www.optimizely.com/
Description: A/B testing software.
Invisionapp
Site: http://www.invisionapp.com/
Description: Web and mobile app prototyping tool
Dyn
Site: http://dyn.com/email/dyn-email-gateway/
Description: Email Gateway.