Hacker News Sorted, a 12-year-old Chrome extension I still use daily
Client-side sorting and true post ages for Hacker News, but the store listing is unavailable.

Email-forwarding receipt intake beats Dext's per-document credit model for small firms.
Solo bookkeepers and small accounting firms
Hubdoc · Dext · AutoEntry
Sorted Receipts is the boring version of what they keep asking for: each client gets one upload link. No account, no app, and forwarding an email to the link works too. Files get classified by month/vendor/type (LLM via OpenRouter), land in one review queue you check off, whatever's missing gets chased on your cutoff date under the bookkeeper's own name, and month-end is a CSV export plus consistently renamed files.
The demo is the real app with seeded data, no signup. Stack: FastAPI + SQLite on one small VPS.
Known rough edges: no direct QBO/Xero posting (export only), classification occasionally mangles handwritten receipts, and the review UI is desktop-first. I'd genuinely value critique of the review-queue UX and whether the sort would survive your messiest shoebox of receipts.
Client-side sorting and true post ages for Hacker News, but the store listing is unavailable.
Beats std::sort and pdqsort by replacing branches with sorting networks.
Zone-mapped sorted heap with 30x smaller IVF index than HNSW, no pgvector limits.
Beats std::sort by 24% on M1 using sorting networks for small subsets and branchless partitioning.
Educational sorting visualizer using a custom teaching language instead of Python.
Sorting visualizer when Visualgo and dozens of alternatives already exist.