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Databases & Data Management
- Heroku Postgres
  - Postgres Basics
  - Postgres Performance
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  - Postgres Special Topics
- Heroku Redis
- Apache Kafka on Heroku
- Other Data Stores

Monitoring & Metrics
- Logging

App Performance

Add-ons
- All Add-ons

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Security
- App Security
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- Compliance

Heroku Enterprise
- Private Spaces
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  - Heroku Connect Administration
  - Heroku Connect Reference
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Patterns & Best Practices

Extending Heroku
- Platform API
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- Building CLI Plugins
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Accounts & Billing

Troubleshooting & Support

Default Ruby for New Apps is Now 2.4.4

Change effective on 31 May 2018

The default Ruby version for new Ruby applications is 2.4.4. You’ll only get the default if the application does not specify a ruby version.

Ruby 2.6.0-preview2 now available on Heroku Git server updated to mitigate security vulnerability