Easeam is a Blender add-on from Orcavia for marking UV seams and unwrapping meshes, aimed at speeding up the seam-marking part of the workflow. It works with Blender 3.0 to 5.0, is Blender extension compatible, and ships under the GPL license.
The add-on collects several seam operators. Mark Around Flat marks seams around linked flat surfaces, set by angle, with an option to grow the selection. Seam Edge Loop marks seams along selected edge loops. Tube seam adds seams on quad-based cylinder geometry, and Seam by Sharp Edge marks seams by sharp edge and/or angle. Auto Unwrap & Seam unwraps and marks seams using Blender's built-in Smart UV Project operator, while Toggle Mode marks and clears seams in one action. Re-Unwrap re-unwraps the whole mesh, including hidden geometry, while keeping the current selection, with an optional auto pack. Auto Seam by Y Verts marks seams on Y-shaped edges, and a UV Map Manager is included.
Every UI element carries a tooltip. Shortcuts can be assigned by right-clicking a button, and the N panel can be hidden in the add-on preferences and accessed through a shortcut or pie menu. A demo video is available.