More Dart  Literally
Various extension libraries that make Dart a better place.

bit_list.dart
provides a space efficent array data structure that compactly stores bits. 
char_matcher.dart
provides a model for character classes, their composition and operations on strings. fraction.dart
provides support for rational number arithmetic.int_math.dart
is a collection of common mathematical functions on ints.iterable.dart
is a collection of iterables and iterators.ordering.dart
a fluent interface for building comparator functions.multiset.data
a data structure where elements might appear more than once.
range.dart
provides a function to create iterables yielding arithmetic progressions.
And there is more to come ...
Continuous build results are available from Jenkins and documentation from the class documentation.
Libraries
 bit_list
 char_matcher

Provides a firstclass model of character classes, their composition and operations on strings.
 fraction

Provides support for rational number arithmetic.
 int_math

A collection of mathematical functions on
int
s.  iterable

Some fancy iterables.
 multiset

Provides a
Set
like data structure where elements are allowed to appear more than once.  ordering

Provides a firstclass model of comparators, their composition and operations on iterables.
 range

A function to create iterables over arithmetic progressions.