X-Ray Selection Tools is a Blender add-on from MarshmallowCirno that introduces new box, circle, and lasso selection tools. Each tool can automatically toggle X-Ray shading and enable selection through geometry, with or without X-Ray active.
The tools can select objects that are either fully enclosed within the selection area or overlapping it, and they adjust selection behavior dynamically based on the direction you drag. You can reach them through the Blender toolbar or with keyboard shortcuts, and a preference to group them with Blender's built-in selection tools lets you control whether they appear in that group.
The add-on is customizable and comes with documentation and a video tutorial from the developer. It runs on Blender 5.1.1 and newer, requires no special permissions, and is released under the GNU General Public License v3.0 or later.