Browse free open source System software and projects for Mac and ChromeOS below. Use the toggles on the left to filter open source System software by OS, license, language, programming language, and project status.

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  • 1

    UPnP PortMapper

    Manage port forwardings via UPnP

    The UPnP PortMapper can be used to easily manage the port mappings/port forwarding of a UPnP enabled internet gateway/router in the local network.
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    Downloads: 330 This Week
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  • 2
    libmms is a library for downloading (streaming) media files using the mmst and mmsh protocols.
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    Downloads: 258 This Week
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  • 3
    OpenAS2

    OpenAS2

    AS2 1.1 server implementation in Java

    OpenAS2 is a java-based implementation of the EDIINT AS2 standard. It is intended to be used as a server. It is extremely configurable and supports a wide variety of signing and encryption algorithms. Supports very high traffic volume allowing parallel processing of files per partner. SUPPORT: Please use the Github issues and Discussions channels here: https://github.com/OpenAS2/OpenAs2App/ Requirements: - Java 11 or newer (tested with the LTS versions of Java up to 21) - Any OS that runs Java Planned enhancements in the next major release: - User interace configuration GUI - Certificate Exchange Management IMPORTANT: Java 8 is no longer supported.
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    Downloads: 104 This Week
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  • 4
    FileBot

    FileBot

    The ultimate TV and Movie Renamer / Subtitle Downloader

    FileBot is the ultimate tool for renaming your movies, tv shows or anime and downloading subtitles. It's smart, streamlined for simplicity and just works. FileBot supports Windows, Linux and Mac, plus there's a full-featured command-line interface for all sorts of automation.
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    Downloads: 96 This Week
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    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

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  • 5
    PostfixAdmin
    PostfixAdmin is a Web Based Management tool created for Postfix. It is a PHP based application that handles Postfix Style Virtual Domains and Users that are stored in MySQL, PostgreSQL or SQLite
    Downloads: 41 This Week
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  • 6
    Tickets CAD (Open ISES)
    Free, open source Computer Aided Dispatch for volunteer fire departments, ARES/RACES, CERT teams, EMS, search & rescue, and campus security. 30+ years of real-world use. Zero cost. Self-hosted.
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    Downloads: 47 This Week
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  • 7
    GeoNetwork opensource - Metadata Catalog
    A web based Metadata Catalog Server for data description and discovery. Supports both generic and geospatial data discovery. It implements international standards (e.g. ISO19115/19139/19119, ISO19115-3, DCAT-AP, CSW 2.0, OGC API Records). It originates from the United Nations and is used by many governments as geoportal software. Active development and discussion takes place on GitHub and OSGeo Discourse. You can also connect directly with the companies supporting the development. Source code available on github https://github.com/geonetwork/
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    Downloads: 183 This Week
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  • 8
    aMSN

    aMSN

    MSN compatible messenger application

    A very nice MSN compatible messenger application, aMSN Messenger is a multiplatform MSN messenger clone. Works pretty much like its Windows based counterpart. Perfect for keeping in touch with those friends who have not yet seen the light. Works on linux
    Downloads: 31 This Week
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  • 9
    udt
    UDT: UDP-based Data Transfer Protocol
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    Downloads: 23 This Week
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

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  • 10
    Gammu

    Gammu

    Cellular manager for mobile phones/modems

    Gammu is a cellular manager for mobile phones/modems. It contains libraries and functions for ringtones,logos,phonebook,SMS,etc. (used by external software), a command line version (with backup/restore) and SMS gateway (with MySQL and PostgreSQL supp
    Downloads: 16 This Week
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  • 11
    aMule AdunanzA
    aMule AdunanzA e' un progetto volto a rendere accessibile la rete Kademlia anche all'utenza Fastweb, grazie alla patch AdunanzA. Questo in specifico per utenti Linux e Mac OS X Per riferimenti alla community italiana http://forum.adunanza.net
    Downloads: 21 This Week
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  • 12
    TCNOpen

    TCNOpen

    Components for IEC61375 standardised communication

    TCNOpen is an open source initiative which the partner railway industries created with the aim to build in collaboration some key parts of new or upcoming railway standards, commonly known under the name TCN. TCN (Train Communication Network) is a series of international standards (IEC61375) developed by Working Group 43 of the IEC (International Electrotechnical Commission), specifying a communication system for the data communication within and between vehicles of a train. It is currently in use on many thousands of trains in the world in order to allow electronic devices to exchange information while operating aboard the same train. TCNOpen follows the Open Source scheme, as the software is jointly developed by participating companies, according to their role, so as to achieve cheaper, quicker and better quality results. Licenses: TRDP: MPLv2.0 http://www.mozilla.org/MPL/2.0/ TRDPSpy: GPL http://www.gnu.org/licenses/gpl.html
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    Downloads: 60 This Week
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  • 13
    Providing a tool to apply the data-recovery capability concepts of RAID-like systems to the posting & recovery of multi-part archives on Usenet.
    Downloads: 15 This Week
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  • 14
    DKIMproxy is an SMTP-proxy that implements the DKIM and DomainKeys standards, to sign and verify email messages using digital signatures and DNS records. It can be used to add DKIM support to nearly any existing SMTP mail server.
    Downloads: 53 This Week
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  • 15
    Phex - P2P Gnutella filesharing program

    Phex - P2P Gnutella filesharing program

    A P2P filesharing client which connects to the Gnutella network.

    Phex is a P2P filesharing client which connects to the Gnutella network. It is multi-plattform and malware-free. It offers advanced functionalities and integrates all common Gnutella extensions like multi-source downloads and advanced search features
    Downloads: 18 This Week
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  • 16
    PyWebMail is a Python library and POP3 gateway that enable working with WebMail servers like with POP3 or IMAP mail server. Currently Mail.Com, Yahoo! Mail, Gmail, Netscape.Net, HotMail and some minor servers support is finished.
    Downloads: 42 This Week
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  • 17
    Route_Serial_TCP_UDP

    Route_Serial_TCP_UDP

    Serial <-> TCP/IP, Serial <-> UDP/IP, TCP/IP <-> UDP/IP

    ScriptCommunicator (scriptable data terminal) script which routes: - serial port (RS232, USB to serial) <-> TCP/IP (Client/Server) - serial port (RS232, USB to serial) <-> UDP/IP - TCP/IP (Client/Server) <-> UDP/IP ScriptCommunicator can be found here: https://sourceforge.net/projects/scriptcommunicator/
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    Downloads: 9 This Week
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  • 18
    A Console-based BitTorrent Client with built-in scheduler for handling multiple sessions. It is designed to manage sessions in queue easily without heavy-weight GUI. External module can search for new torrents in trackers and submit it automatically.
    Downloads: 30 This Week
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  • 19

    namefix.pl, 1st and best batch renamer

    Cross-platform batch file renamer with GUI and CLI since 2000

    namefix.pl is a cross-platform batch file renaming utility first released in 2006. It automates the cleanup of large sets of filenames using regular expressions and configurable rules. Features include handling of whitespace, punctuation, extensions, directory processing, safe overwrite checks, and dry-run mode. Both command-line and Tk GUI interfaces are provided. The project was created by Jacob Jarick and is licensed under the GNU General Public License (GPL).
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    Downloads: 27 This Week
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  • 20
    Java SIP softphone
    Peers is a very simple softphone. It's a SIP User-Agent, written in java, it works on windows, linux and mac. It can be used with SIP servers like opensips or asterisk IPBX. It supports G711 codec (PCMU and PCMA) and telephone-events (DTMF).
    Downloads: 4 This Week
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  • 21
    A cross-platform Python Bluetooth API for Mac OS X, GNU/Linux and Python For Series 60. Provides simple device and service discovery, RFCOMM sockets, L2CAP client sockets, OBEX file transfer, service advertising, and access to local device information.
    Downloads: 9 This Week
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  • 22

    Remote Tea

    Java-based ONC/RPC implementation

    A complete Java-based implementation of Sun's ONC/RPC Remote Procedure Protocol, including client and server functionality and some associated tools. No native code involved, only Java.
    Downloads: 8 This Week
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  • 23
    Phosphor is a peer-to-peer file sharing program. XML network protocol, with source in Java and Swing. Uses thread pools extensively and is designed to scale very well. Chat capabilities. This is Napster done right!
    Downloads: 13 This Week
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  • 24
    Using the new C# Dll from swig portability of Openobex/ObexFtp to write a nice GUI able to transfer file between two devices with obex protocol. More Info’s here: http://cs-obexftp.wiki.sourceforge.net/
    Downloads: 11 This Week
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  • 25
    DNA is an open, flexible and extensible deep network analyzer software server and software architecture for gathering and analyzing network packets, network sessions and applications protocols, passively off enterprise class networks.
    Downloads: 9 This Week
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