Fuel

• Community Supported - Supported by the open-source community.
• Only extensions, no changes - Code extensions but no changes in existing code.
• Squeak 4.4 - Released December, 2012
• MIT - The MIT license is like BSD without the advertising clause. As free as it gets, suitable for cross Smalltalk 100% reuse. The recommended license for Squeak since the 4.0 release.
• Stable - Useable by all. Bugs are rare.

Changes:

• (feature) DoIt and not-installed CompiledMethods are fully serialized by default.
• (fix) Date & DateAndTime (thanks Cami and Marcus) (already included in Fuel 1.8.1 and 1.8.2).
• (feature) New hooks methods #fuelNew and #fuelNew: for custom instantiation (see "Hooking instance creation" in Customizing the Graph).
• Globals:

- Added #globalEnvironment: to specify where the globals are looked-up. (see "Changing the environment" in Managing Globals).
- Explicit references to "Smalltalk globals" changed to "self class environment".
- A SystemDictionary instance is not treated as global when it is not "Smalltalk globals".

• Documentation:

- General update
- New Format Migration section.
- New Built-in Header Support section.

• (feature) Put back FLSerializeron:.
• (optimization) New clusters for SmallInteger.
• (optimization) New clusters for most common collections.
• (feature) Built-in support for header (See Built-in Header Support):

- pre and post materialization actions (clean closures).
- attach additional objects.
- materialize only the header.

• (fix) Safer substitutions (see FLPluggableSubstitutionTesttestPrivateExcluded).
• (feature) Materialize .fuel files when drag&dropped in the image.
• (cleanup) Removed unneeded cluster: FLWellKnownObjectsCluster.