Browse free open source C SQL Clients and projects below. Use the toggles on the left to filter open source C SQL Clients by OS, license, language, programming language, and project status.

  • The Most Powerful Software Platform for EHSQ and ESG Management Icon
    The Most Powerful Software Platform for EHSQ and ESG Management

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    Choose from a complete set of software solutions across EHSQ that address all aspects of top performing Environmental, Health and Safety, and Quality management programs.
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    Skillfully - The future of skills based hiring

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    Skillfully transforms hiring through AI-powered skill simulations that show you how candidates actually perform before you hire them. Our platform helps companies cut through AI-generated resumes and rehearsed interviews by validating real capabilities in action. Through dynamic job specific simulations and skill-based assessments, companies like Bloomberg and McKinsey have cut screening time by 50% while dramatically improving hire quality.
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  • 1
    IvorySQL

    IvorySQL

    Open Source Oracle Compatible PostgreSQL

    IvorySQL is an open-source PostgreSQL-compatible database that extends core Postgres with Oracle compatibility features. It adds support for PL/SQL, Oracle-style functions, and procedural syntax, making it easier for teams migrating Oracle workloads to open-source environments. IvorySQL retains PostgreSQL's performance and ecosystem while broadening compatibility.
    Downloads: 21 This Week
    Last Update:
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  • 2
    IndigoSCADA
    Open source SCADA running on Windows and Linux/WINE. Development environment ANSI C/C++98. HMI is based on Qt library. Different technologies (EiC, GigaBASE, FastDB, ORTE) have been integrated. Supported drivers: OPC DA 2.05a, AE 1.10, HDA 1.20, XML DA 1.0, OPC UA 1.03, DNP 3.0, Modbus TCP/RTU, MQTT 3.1.1/Sparkplug B, IEC 60870-5-101/103/104, IEC 62056 DLMS/COSEM, IEC 61850, M-BUS, SNMP, Ethernet/IP, FINS/TCP.
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    Downloads: 44 This Week
    Last Update:
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  • 3
    Apache AGE

    Apache AGE

    Graph database optimized for fast analysis

    Apache AGE (A Graph Extension) is a PostgreSQL extension that adds support for graph database functionality using the openCypher query language. AGE allows users to store and query graph-structured data alongside traditional relational data in a single database. Built for performance and scalability, it brings the power of graph queries to the robustness of PostgreSQL, making it suitable for use cases like social networks, recommendation systems, and fraud detection.
    Downloads: 5 This Week
    Last Update:
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  • 4
    repmgr

    repmgr

    A lightweight replication manager for PostgreSQL (Postgres)

    repmgr is a management tool for PostgreSQL replication, providing monitoring, failover, and administrative capabilities for streaming replication setups. It simplifies the configuration of primary/standby clusters and automates failover processes for high availability. repmgr is widely used in production environments where database resilience and minimal downtime are critical.
    Downloads: 2 This Week
    Last Update:
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  • Caller ID Reputation provides the most comprehensive view of your caller ID scores across all carriers Icon
    Caller ID Reputation provides the most comprehensive view of your caller ID scores across all carriers

    Instantly identify flagged caller IDs and decrease flags by up to 95% your first month.

    Keep your agents on the phone with increased connection rates by monitoring your phone number reputation across all major carriers and call blocking apps.
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  • 5
    PgAgroal

    PgAgroal

    High-performance connection pool for PostgreSQL

    pgagroal is a high-performance PostgreSQL connection pooler written in C, designed for minimal latency and efficient resource usage. It provides features like secure authentication, hot reloading, and support for multiple databases, making it suitable for low-latency applications and microservice architectures. pgagroal is optimized for fast startup, low overhead, and easy integration.
    Downloads: 1 This Week
    Last Update:
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  • 6
    APQ is an Ada95 thick binding to allow Ada SQL client programs to access PostgreSQL, MySQL and Sybase database systems. The project is now hosted at http://framework.kow.com.br
    Downloads: 0 This Week
    Last Update:
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  • 7
    CStore FDW

    CStore FDW

    Columnar storage extension for Postgres

    cstore_fdw is a columnar store extension for PostgreSQL built by Citus Data using the Foreign Data Wrapper (FDW) interface. It stores data in a compressed, columnar format that significantly reduces disk I/O for analytical queries. Ideal for read-heavy workloads and time-series data, cstore_fdw enhances Postgres’ ability to serve as a lightweight data warehouse.
    Downloads: 0 This Week
    Last Update:
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  • 8
    A Gnome/GTK SQL client designed for quick browsing and editing of data.
    Downloads: 0 This Week
    Last Update:
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  • 9

    NCURSES Derby

    Horse racing simulation

    Now with sqlite3 data storage of racing statistics. A horse racing game programmed with NCURSES and using the menu library. Has a betting window where you choose horse and finish. Simulation is with keyboard characters (~/^\^) to simulate the horses. After the race a results screen can be shown that shows winners and payoff amounts.
    Downloads: 0 This Week
    Last Update:
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    The AI coach for teams, built on validated assessments.

    Cloverleaf is an assessment-backed AI Coach that fully understands your people and the context of their workday.

    Give managers and teams proactive, contextual coaching to lead effectively, communicate clearly, and navigate real work situations as they happen.
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  • 10
    PLpgSQL Check

    PLpgSQL Check

    plpgsql_check is a linter tool (does source code static analyze)

    plpgsql_check is a PostgreSQL extension for static analysis and runtime checking of PL/pgSQL functions. It helps developers catch bugs early by analyzing code structure, variable usage, and SQL correctness before execution. The extension is ideal for improving code quality in large Postgres-based applications.
    Downloads: 0 This Week
    Last Update:
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  • 11
    lib4d_sql is a C library providing the required functions (connect, prepare, execute, ...) to write a SQL client for 4D databases. It uses the public 4D SQL protocol wich is supported by 4D products since... the version 11. It is already used by the PDO_
    Downloads: 0 This Week
    Last Update:
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