* https://github.com/LMDB/sqlightning
* https://www.openldap.org/pub/hyc/mdb-paper.pdf
* https://github.com/btrask/sqlheavy
* https://sqlite.org/src4/tree?ci=trunk
* https://bintray.com/version/files/homebrew/mirror/berkeley-db/18.1.32
* https://fossies.org/linux/misc/db-18.1.32.tar.gz
* https://github.com/rqlite/rqlite
* https://github.com/Expensify/Bedrock
* https://github.com/bloomberg/comdb2
* https://github.com/kripken/sql.js/
* https://github.com/biokoda/actordb
* https://github.com/wal-g/wal-g
* https://github.com/gdev2018/sqlite3odbc
* https://www.gaia-gis.it/fossil/libspatialite/index
* https://github.com/gigimushroom/DatabaseBackendEngine
* https://bintray.com/version/files/homebrew/mirror/berkeley-db/18.1.40
* https://github.com/btrask/libkvstore
* https://github.com/bloomberg/comdb2
* https://github.com/malbrain/database/wiki
* https://github.com/dgraph-io/badger
* https://www.sciencedirect.com/science/article/pii/S1742287618300471
* https://github.com/fastogt/fastonosql
* https://github.com/inflex/undark
* https://github.com/mdegrazia/SQLite-Deleted-Records-Parser
* https://www.cs.utexas.edu/~vijay/papers/apsys17-sqlite.pdf
* https://www.sqlite.org/sqllogictest/doc/trunk/about.wiki
* https://github.com/sqlite/sqlite/tree/master/test
* https://github.com/brianfrankcooper/YCSB/
* https://github.com/greenrobot/android-database-performance
* https://github.com/akopytov/sysbench
* https://www.diva-portal.org/smash/get/diva2:736996/FULLTEXT01.pdf
* https://pdfs.semanticscholar.org/c2da/33304627649b599f80a5428354e116ba6201.pdf
* https://github.com/microsoft/sqlite-tracer
* https://discuss.zetetic.net/t/sqlcipher-performance-optimization/14
* https://www.sqlite.org/see/doc/release/www/readme.wiki
* https://github.com/sqlcipher/sqlcipher
* https://github.com/resilar/sqleet
* https://github.com/newsoft/sqlite3-dbx
* https://github.com/darkman66/SQLite3-Encryption
* https://github.com/utelle/wxsqlite3/
* https://github.com/Expensify/Bedrock
* https://github.com/pingcap/tidb/
* https://github.com/phpmyadmin/sql-parser
* https://github.com/src-d/go-mysql-server
* https://github.com/ClickHouse/ClickHouse/tree/146109fe27074229a38cd704d60f23ec7bd2ed67/base/mysqlxx