Only one issue per active contributor, names the issue with which the contributor should continue when returning to the project after longer absence

An issue that new contributors could help solve.

Issues that don't necessarily need to be implemented

Anything that needs to be done soon or is a big issue. Major cornerstones of a project should usually be high priority issues.

Anything that should be done sometime, but is really not that important

Anything that needs to be done sooner or later.

Can't be implemented, because it depends on something else

Issues that are in development

Implemented issues that now need to be tested

Issues that were in development once, but that haven't been worked on for a long time