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Heroku Architecture
- Compute (Dynos)
  - Dyno Management
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Command Line

Deployment
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Continuous Delivery & Integration
- Continuous Integration

Language Support
- Node.js
  - Working with Node.js
  - Troubleshooting Node.js Apps
  - Node.js Behavior in Heroku
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- Python
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  - Background Jobs in Python
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  - Working with Django
- Java
  - Java Behavior in Heroku
  - Working with Java
  - Working with Maven
  - Working with Spring Boot
  - Troubleshooting Java Apps
- PHP
  - Working with PHP
  - PHP Behavior in Heroku
- Go
  - Go Dependency Management
- Scala
- Clojure
- .NET

Databases & Data Management
- Heroku Postgres
  - Postgres Basics
  - Postgres Getting Started
  - Postgres Performance
  - Postgres Data Transfer & Preservation
  - Postgres Availability
  - Postgres Special Topics
- Heroku Key-Value Store
- Apache Kafka on Heroku
- Other Data Stores

Monitoring & Metrics
- Logging

App Performance

Add-ons
- All Add-ons

Collaboration

Security
- App Security
- Identities & Authentication
  - Single Sign-on (SSO)
- Compliance

Heroku Enterprise
- Private Spaces
  - Infrastructure Networking
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- Heroku Connect (Salesforce sync)
  - Heroku Connect Administration
  - Heroku Connect Reference
  - Heroku Connect Troubleshooting

Patterns & Best Practices

Extending Heroku
- Platform API
- App Webhooks
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  - Add-on Development Tasks
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  - Add-on Guidelines & Requirements
- Building CLI Plugins
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Accounts & Billing

Troubleshooting & Support

Integrating with Salesforce

Python 2.7.10 Support

Change effective on 27 May 2015

Heroku now supports Python 2.7.10. You can specify a version with a runtime.txt file.

Python 2.7.10 is now default for all new Python applications. Existing applications will not be automatically updated.

Scala buildpack adds support for Play 2.4 Heroku Python with updated Pip and Distribute