Tarantool is an in-memory database and application server. It is 100% compatible drop-in replacement for Lua 5.1, based on LuaJIT 2.1. It has full support for Lua modules and a rich set of own modules, including cooperative multitasking, non-blocking I/O, access to external databases, etc.
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The in-memory database supports two data engines: 100% in-memory with optional persistence and a 2-level disk-based B-tree, to use with large data sets. It supports multiple index types: HASH, TREE, RTREE, BITSET. Tarantool is ideal for data-enriched components of scalable Web architecture: queue servers, caches, stateful Web applications.

Tarantool is an in-memory database and application server. It is 100% compatible drop-in replacement for Lua 5.1, based on LuaJIT 2.1. It has full support for Lua modules and a rich set of own modules, including cooperative multitasking, non-blocking I/O, access to external databases, etc.

Tarantool - Get your data in RAM. Get compute close to data. Enjoy the performance

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. It is faster than popular client/server database engines. 
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SQLite is popular choice for the database engine in cellphones, PDAs, MP3 players, set-top boxes, and other electronic gadgets. SQLite has a small code footprint, makes efficient use of memory, disk space, and disk bandwidth, is highly reliable, and requires no maintenance from a Database Administrator.

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. It is faster than popular client/server database engines. 

Sqlite - SQL database engine

Sophia is RAM-Disk hybrid storage. It is designed to provide best possible on-disk performance without degradation in time. It has guaranteed O(1) worst case complexity for read, write and range scan operations. It provides Full ACID compliancy, MVCC engine, Optimistic, non-blocking concurrency with N-writers and M-readers, Prefix search, Automatic key-expire, Implemented as small C-written library with zero dependencies and lot more.

Sophia - Advanced transactional MVCC key-value/row storage library

SSDB is a high performace key-value(key-string, key-zset, key-hashmap) NoSQL database, an alternative to Redis. SSDB is stable, production-ready and is widely used by many Internet companies including QIHU 360. Its feature include Redis client support, Persistent queue service, LevelDB  support, Built in CLI and lot more.

SSDB - A fast NoSQL database, an alternative to Redis

Npgsql is a .NET data provider for PostgreSQL. It allows you to connect and interact with PostgreSQL server using .NET.For any additional information, please visit the Npgsql website at http://www.npgsql.org.

Npgsql -.NET data provider for PostgreSQL.

Bilt lets you build your own web based database application with very little IT knowledge. Use the standard core or add some plugins or use a ready made app to fast track development of your very own database application. It helps to create an unlimited number of entities with unlimited number of fields and filters and configure form and listing view.

Bilt - Build Your Own Web Based Database Application

TerarkDB is a core product of Terark. It is a RocksDB distribution that powered by Terark algorithms. with these algorithms, TerarkDB is able to store more data and access much faster than official RocksDB(3+X more data and 10+X faster) on same hardware.

TerarkDB - High performance database with the best compression

LMDB is an extraordinarily fast, memory-efficient database developed for the Symas OpenLDAP Project. With memory-mapped files, it has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases. With only 32KB of object code, LMDB may seem tiny. But it’s the right 32KB. Compact and efficient are two sides of a coin; that’s part of what makes LMDB so powerful.

LMDB - Lightning Memory-mapped Database

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