Improved Node Search extends Blender's node tree search with text queries across node names, labels and the blidname type property, plus a regular expression option for more precise matching. Geometry nodes can also be searched by attribute, and version 1.0.5 added search in sockets along with a help popup.
Beyond text, the extension flags problems in a node tree. It can find disconnected nodes that have outputs but no connections, image nodes with missing or invalid images, and node groups with empty trees. Matches can be selected together or stepped through one at a time using the Select Found, Previous and Next buttons.
Found nodes are marked with a border when on-screen or a circle indicating location when off-screen, and occurrences within a node group show as a number beside the node. The Highlight Color, Border Attenuation and Text Size are customizable, and the overlay toggles on and off. It works in Shader, Geometry, Compositor and other node trees, opening via CTRL+F or the N-Panel Tool panel.