Developers and Open Source authors now have a massive amount of services offering free tiers but it can be hard to find them all in order to make informed decisions.

This then is a list of software, SaaS, PaaS, IaaS etc offerings that have free tiers for devs.

You can help by sending Pull Requests to add more services. Once I have a good set of link in this README file I'll look into a better layout for the information and links, help with that appreciated too.

If you're not inclined to make PRs you can tweet me at @ripienaar

• https://bitbucket.org/ - Unlimited public and private git repos for small teams
• https://github.com – Free for an unlimited number of public repositories
• https://about.gitlab.com/ - Unlimited public and private git repos with unlimited collaborators

• https://www.flowdock.com/ - Chat and inbox, free for teams of 5 or less
• https://slack.com - Free for unlimited users with some feature limitations
• https://hipchat.com - Free for unlimited users with some feature limitations
• https://gitter.im - "Chat, for GitHub". Free for public rooms.

• https://landscape.io/ - Code Quality for Python projects, free for Open Source
• https://codeclimate.com/ - Automated code review, free for Open Source
• http://www.sonarqube.org/ - Static code analysis, code coverage, technical debt management
• https://houndci.com/ - Comments on github commits about code quality - free for open source
• https://coveralls.io/ - Display test coverage reports - free for open source
• https://scrutinizer-ci.com/ - Continuous inspection platform - free for open source

• https://codeship.com/ - 100 private builds / month, 5 private projects. Unlimited for Open Source
• https://circleci.com – free for one concurrent build
• https://travis-ci.org – free for public Github repositories.
• http://wercker.com/ - free for public and private repositories
• https://drone.io/ - CI platform that includes browser testing, free for Open Source

• https://www.globalsign.com/en/ssl/ssl-open-source/ - Free SSL certs for Open Source projects

• https://opbeat.com/ - release, deploy, monitor. Free for 3 users

• https://papertrailapp.com/ - 48 hours search, 7 day archive, 100MB/month
• https://logentries.com/ - Free up to 5GB/month with 7 day retention
• https://www.loggly.com/ - Free for a single user, see the lite option

• https://www.datadoghq.com/ - Free for up to 5 nodes
• http://www.stackdriver.com/ - Free for up to 10 nodes/services
• http://newrelic.com/ - Free with 24 hour data retention
• https://nodequery.com/ - Free basic server monitor up to 10 servers
• https://www.pingdom.com/free/ - 1 site free
• https://www.opsgenie.com/ - Alert management with mobile push. 600 free alerts for 2 users a month
• https://www.runscope.com/ - Monitor and log API usage. Single user 10,000 request/month free
• http://www.circonus.com/ - Free for 20 metrics
• https://uptimerobot.com/ - Website monitoring, 50 monitors free
• https://www.statuscake.com/ - Website monitoring, unlimited tests free with limitations
• http://www.boundary.com/ - Free 1 second resolution for up to 10 servers
• https://ghostinspector.com/ - Free website and web application monitoring. Single user, 100 test runs per month
• http://java-monitor.com/ - Free monitoring of JVM's and uptime

• https://rollbar.com/ - Exception and error monitoring, free for prototypes and personal projects
• https://bugsnag.com/ - Free for up to 2000 errors a month after the initial trial
• https://airbrake.io/ - Free for 1 project, 1 user, 2 errors per minute, 2 day retention

• https://swiftype.com – hosted search solution (API and crawler). Free for a single search engine with up to 1000 documents. Free upgrade to Premuim level for open-source projects.

• http://www.mailgun.com/ - First 10 000 emails are free
• http://mailchimp.com/ - Send 12,000 emails to 2,000 subscribers for free
• http://sendgrid.com/ - 400 emails per day for free
• http://mandrill.com/ - First 12,000 emails are free
• https://www.phplist.com/ - Hosted version allow 300 mails per months for free
• https://www.mailjet.com/ - 6000 mails per months for free

• http://www.cloudflare.com/ - Basic service is free, good for a blog etc
• http://www.bootstrapcdn.com/ - CDN for bootstrap, bootswatch and font awesome

• http://aws.amazon.com/free/ - AWS Free Tier - free for 12 months
• https://cloud.google.com/compute/ - Google Cloud Platform gives $300 over 60 days
• https://www.engineyard.com - Engine Yard provides 500 free hours
• http://azure.microsoft.com/ - MS Azure gives $200 worth of free usage for a trial
• https://appharbor.com/ - A .Net PaaS that provides 1 free worker
• https://www.heroku.com/ - Host your apps in the cloud, free for single process apps
• https://bluemix.net/ - IBM PaaS with a monthly free allowance
• https://www.openshift.com/ - RedHat OpenShift offers 3 free hosted apps
• https://bitnami.com/ - One free small app

• https://exoscale.ch/ - Free resources for Open Source projects
• https://mongolab.com/ - Free 500MB MongoDB
• https://cloudant.com/ - Hosted database from IBM, free if usage is below $50/month
• https://developer.rackspace.com/ - Rackspace Cloud gives $50/month for 12 months

• https://auth0.com/ - hosted free for development SSO
• https://getclef.com/ - new take on auth unlimited free tier for anyone not using premium features
• https://ringcaptcha.com/ - tools to use phone number as id, available for free

• https://www.atlassian.com/opensource/overview - Free Jira etc for Open Source projects

• https://www.aerofs.com/ - behind-the-firewall dropbox, free for 30 users

• http://cloudinary.com - Image upload, powerful manipulations, storage, and delivery for sites and apps, with libraries for Ruby, Python, Java, PHP, Objective-C and more. Perpetual free tier includes 7500 images/month, 2gb storage, 5gb bandwidth.

• https://quay.io/ - unlimited free public containers