TraceLit – debug LeetCode step by step
Visualizes pointer movement in trees for your code, unlike Python Tutor.

The app turns projects into draggable node graphs with color tagging, visible dependency links, and progress indicators — exactly the kind of direct-manipulation UI people who think visually will enjoy. The developer highlights a local-first stance (no data collected) and the screenshots show fast node creation and on-canvas editing, but the idea is familiar territory (mind-mappers and visual planners already cover this space) so it needs a unique workflow or integrations to stand out.
Individual users, freelancers and small teams who prefer visual/project-graph planning over lists
Visualizes pointer movement in trees for your code, unlike Python Tutor.
Pretty WordNet graph visualization, but static data exploration without novel semantic insights.
Canonical piece decomposition visualization makes O(log N) queries actually click.
Cytoscape.js graph traversal through 3M Wikidata entities with trivia mode.
PR comments with proto schema diffs is genuinely useful for gRPC teams.
Maps entire human science as derivation chains, but execution incomplete and dataset coverage unproven.