The below tools are text-based. UI developer tools are documented separately.

Workflow
The listener
Editor integration
Runtime code reloading
Unit testing
Help system

Debugging
The prettyprinter
The inspector
Stack effect tools
Word annotations
Deprecation tracking

Browsing
Printing definitions
Definition cross referencing
Vocabulary hierarchy tools

Performance
Timing code and collecting statistics
Sampling profiler
Object memory tools
Listing threads
Destructor tools
Disassembling words

Deployment
Application deployment