Redmine

Select to Search adds incremental search to Redmine select boxes.

It uses Choices.js for ordinary select boxes and keeps Redmine-managed list boxes native, adding a small search input instead.
This avoids breaking issue query columns, filters, and multi-select controls that are directly handled by Redmine's own JavaScript.

For new installations, Redmine 6.1.x or 6.0.x is recommended.
Redmine 5.1.x is treated as legacy compatibility.
Redmine 4.x and older are unsupported EOL stacks, although 4.2.11 and 3.4.13 were reference-tested.