This is a preliminary version of the Rust compiler, libraries and tools.

Source layout:

Path	Description
librustc/	The self-hosted compiler
liballoc/	Rust's core allocation library
libcore/	The Rust core library
libdebug/	Debugging utilities
libstd/	The standard library (imported and linked by default)
libgreen/	The M:N runtime library
libnative/	The 1:1 runtime library
libsyntax/	The Rust parser and pretty-printer
libtest/	Rust's test-runner code
-------------------	---------------------------------------------------------
libarena/	The arena (a fast but limited) memory allocator
libbacktrace/	The libbacktrace library
libcollections/	A collection of useful data structures and containers
libflate/	Simple compression library
libfmt_macros/	Macro support for format strings
libfourcc/	Data format identifier library
libgetopts/	Get command-line-options library
libglob/	Unix glob patterns library
libgraphviz/	Generating files for Graphviz
libhexfloat/	Hexadecimal floating-point literals
liblibc/	Bindings for the C standard library
liblog/	Utilities for program-wide and customizable logging
libnum/	Extended number support library (complex, rational, etc)
librand/	Random numbers and distributions
libregex/	Regular expressions
libregex_macros/	The regex! syntax extension
libsemver/	Rust's semantic versioning library
libserialize/	Encode-Decode types library
libsync/	Concurrency mechanisms and primitives
libterm/	ANSI color library for terminals
libtime/	Time operations library
liburl/	URL handling lirary
libuuid/	UUID's handling code
-------------------	---------------------------------------------------------
rt/	The runtime system
rt/rust_*.c	- Some of the runtime services
rt/vg	- Valgrind headers
rt/msvc	- MSVC support
rt/sundown	- The Markdown library used by rustdoc
-------------------	---------------------------------------------------------
compiletest/	The test runner
test/	Testsuite
test/codegen	- Tests for the LLVM IR infrastructure
test/compile-fail	- Tests that should fail to compile
test/debug-info	- Tests for the debuginfo tool
test/run-fail	- Tests that should compile, run and fail
test/run-make	- Tests that depend on a Makefile infrastructure
test/run-pass	- Tests that should compile, run and succeed
test/bench	- Benchmarks and miscellaneous
test/pretty	- Pretty-printer tests
test/auxiliary	- Dependencies of tests
-------------------	---------------------------------------------------------
librustdoc/	The Rust API documentation tool
libuv/	The libuv submodule
librustuv/	Rust libuv support code
-------------------	---------------------------------------------------------
llvm/	The LLVM submodule
rustllvm/	LLVM support code
-------------------	---------------------------------------------------------
etc/	Scripts, editors support, misc

NOTE: This list (especially the second part of the table which contains modules and libraries) is highly volatile and subject to change.