The DUB package registry  has finally gained support for the text and
category based search of packages. There is also a category for D
standard library candidate modules, as has been suggested recently.
If you already have any registered packages, please log in and add the
proper categories to each of them ("My packages" -> click on package
name). Should there be no exact category match, and that specific
category is likely to have multiple entries in the future, please make a
corresponding pull request against the category file  on GitHub.
It's still all a little rough around the edges. Any bugs can be reported
on the issue tracker  or discussed in the forum .