The entire set of Emoji codes as defined by the unicode consortium is supported in addition to a bunch of aliases. By default, only the official list is enabled but doing emoji.emojize(use_aliases=True) enables both the full list and aliases.

jtreg is the test harness used by the OpenJDK test framework. This framework is intended primarily for regression tests. It can also be used for unit tests, functional tests, and even simple product tests -- in other words, just about any type of test except a conformance test, which belong in a TCK.

An hypothetical, or virtual, index is an index that doesn't really exists, and thus doesn't cost CPU, disk or any resource to create. They're useful to know if specific indexes can increase performance for problematic queries, since you can know if PostgreSQL will use these indexes or not without having to spend resources to create them.

kanjidraw is a simple Python library + GUI for matching (the strokes of a) handwritten kanji against its database.

Check if a remote computer is up. It can either just call the system ping command, or check a specified TCP port.

Wikidata Toolkit is a Java library for accessing Wikidata and other Wikibase installations. It can be used to create bots, to perform data extraction tasks (e.g., convert all data in Wikidata to a new format), and to do large-scale analyses that are too complex for using a simple SPARQL query service.