[githubalphapapa]

Emacs's Org mode has this functionality in its own Agenda features. See also the third-party package org-ql, which provides similar tools, like views (saved searches) and alternative query languages.

As Bob Newell (linked in the article) notes, Emacs and Org seem to carry this torch today. There may still be a few tricks unique to Lotus Agenda and such tools, but Org mostly surpasses them, and its flexibility and extensibility go far beyond what Lotus Agenda and its primitive macro language could do.