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Heroku Architecture
- Dynos (app containers)
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Continuous Delivery
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Language Support
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- Scala
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Databases & Data Management
- Heroku Postgres
  - Postgres Basics
  - Postgres Getting Started
  - Postgres Performance
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  - Postgres Availability
  - Postgres Special Topics
- Heroku Data For Redis
- 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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- Enterprise Teams
- Heroku Connect (Salesforce sync)
  - Heroku Connect Administration
  - Heroku Connect Reference
  - Heroku Connect Troubleshooting

Patterns & Best Practices

Extending Heroku
- Platform API
- App Webhooks
- Heroku Labs
- Building Add-ons
  - Add-on Development Tasks
  - Add-on APIs
  - Add-on Guidelines & Requirements
- Building CLI Plugins
- Developing Buildpacks
- Dev Center

Accounts & Billing

Troubleshooting & Support

Integrating with Salesforce

JRuby 1.7.2 now available

Change effective on 09 January 2013

The Ruby stack now supports JRuby 1.7.2 in both 1.9.3 and 1.8.7 mode. The JRuby release notes can be found here.

Grails Supports JDK 1.6 or 1.7 Grails 2.2.0 Support