The most value-dense software ever written lives here. SQLite is ~750KB, public domain, and runs on every phone on earth — the archetype of everything this directory looks for.
| # | Tool | T·V·P·E | Index | Type | |
|---|---|---|---|---|---|
| 1 | SQLite Most deployed database on earth, zero config |
5.0 | self-host | ✓ | |
| 2 | DuckDB SQLite for analytics — OLAP in-process |
5.0 | self-host | ~ | |
| 3 | Valkey Community fork of Redis under BSD |
5.0 | self-host | ~ | |
| 4 | PostgreSQL The world's most advanced open-source database |
4.8 | self-host | ~ |
Max ~7 listings per category, by design — curation is the product. Think something belongs here? Submit it; it has to displace an incumbent.