Showing 292 open source projects for "security operating system"

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  • 1
    Tutanota

    Tutanota

    Open source email service with a strong focus on security and privacy

    Tutanota is an open source email client focused on security and privacy. It is built with end-to-end encryption and 2FA, so you can be assured of utmost email security. Tutanota is always encrypted, so whether you’re using their secure webmail client, mobile apps or desktop clients, you can be sure to communicate securely.
    Downloads: 11 This Week
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  • 2
    ObjectivePGP

    ObjectivePGP

    ObjectivePGP is an open-source library for iOS and macOS

    ObjectivePGP is an open-source library for OpenPGP encryption, decryption, signing, and verification in Objective-C and Swift. It enables developers to add PGP-based security to iOS and macOS apps.
    Downloads: 12 This Week
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  • 3
    Proton Mail for Android

    Proton Mail for Android

    Proton Mail Android app

    Proton Mail for Android is the official mobile application that lets users access their Proton Mail encrypted email accounts securely on Android devices, providing the full suite of messaging features while preserving end-to-end encryption and user privacy. Designed for modern Android phones and tablets, the app lets users send, receive, organize, and search encrypted emails, create new Proton accounts, manage multiple accounts, and apply labels or folders to keep messages tidy — all within...
    Downloads: 4 This Week
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  • 4
    Agentic Inbox

    Agentic Inbox

    A self-hosted email client with an AI agent, running entirely on Cloud

    ...It runs entirely on Cloudflare Workers, using serverless infrastructure to manage incoming and outgoing messages without relying on external email services. Each mailbox is isolated with its own storage, ensuring data separation and security while maintaining performance. The system supports full email functionality, including sending, receiving, threading, and attachment management through a modern web interface. Its AI agent can search conversations, summarize messages, and generate replies, while still requiring human approval before sending. The architecture combines durable state management, storage services, and AI inference into a unified workflow. ...
    Downloads: 0 This Week
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  • 5
    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server implements multiple spam filters

    The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261. A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are...
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    Downloads: 37,962 This Week
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  • 6
    GoldBug - Encrypted Communications

    GoldBug - Encrypted Communications

    Chat Messenger. E-Mail-Client. Websearch. Filetransfer.

    GoldBug is a decentralized & secure communication suite that offers an integrated e-mail client, an instant messenger & a file transfer. Also included is an URL-RSS-DB & a p2p web search. Current vers. w/ McEliece Algorithm. GoldBug has been 2013 - 2023 ten years just another Graphical User Interface of the Spot-On Encryption Suite. Main GUI features: Minimal & colorful Interface with Tabs in the East. Microsoft & Qt MinGW deprecated Win32 & for Compiling: ●...
    Downloads: 7 This Week
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  • 7

    bogofilter -- Fast Bayesian Spam Filter

    Fast Bayesian spam filter along lines suggested by Paul Graham

    The bogofilter package implements a fast Bayesian spam filter as suggested by Paul Graham in "A Plan For Spam" <http://www.paulgraham.com/spam.html>. It is written in C. Supported platforms: Linux, FreeBSD, Solaris, OS X, HP-UX, AIX, RISC-OS, ...
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    Downloads: 91 This Week
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  • 8
    Fetchmail - the mail-retrieval daemon

    Fetchmail - the mail-retrieval daemon

    Client daemon to move mail from POP and IMAP to your local computer

    Fetchmail is a mail retrieval daemon that can download messages from POP3, IMAP, ODMR and ETRN-based stores, with SSL/TLS security including certificate verification, and pass downloaded mail to a local SMTP or LMTP server, or a message delivery agent such as maildrop.
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    Downloads: 147 This Week
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  • 9

    Mail2sh

    Executes orders received by email

    ...Email is sent to a particular user on your host and the commands will be carried out if the user and password given matches ones in /etc/passwd. Commands are executed with the user's privileges, and combined with a PGP module ensures a certain level of security for use. Note that the system is not natively encrypted, so use of an encryption mechanism is highly recommended for security reasons.
    Downloads: 1 This Week
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  • 10
    MailCleaner

    MailCleaner

    Anti Spam SMTP Gateway

    MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project https://github.com/SpamTagger [antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready. MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet. It...
    Downloads: 6 This Week
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  • 11
    Perl ECS

    Perl ECS

    EMDIS::ECS Perl module

    Perl ECS implements the EMDIS Communication System (ECS), following specifications developed for the European Marrow Donor Information System (EMDIS). ECS is a "communication service for the automatic exchange of messages" via email. Published EMDIS::ECS releases are available from CPAN.
    Downloads: 2 This Week
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  • 12
    Multiuser BBS/Internet Server Software for multiple platforms including Windows and Linux (legacy versions maintained for DOS and OS/2). Multithreaded modular C/C++ project that includes Telnet, FTP, and Mail servers and support for popular DOS doorgames.
    Downloads: 4 This Week
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  • 13
    IndiMail
    Highly scalable/configurable Messaging Platform allowing users in a domain to be distributed on multiple hosts, has multiple queues. Provides virtual domains/users in MySQL. Modern MSP class qmail replacement with ESMTP, POP3/IMAP, QMTP, QMQP support
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    Downloads: 4 This Week
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  • 14

    X-Itools: Email/Web Log Search Engine

    Strong Email & Apache Log Analysis with Active Security Features

    X-Itools: eXtended Internet Tools. Suite of tools composed of several collaboration modules. Old and initial project born in 1999, 1st published in 2001 on Sourceforge. X-Itools E-mail management module (log analysis) initiated in 2004 with Web 1.0 technologies (private SVN server). X-Itools development restarted since 2011, on the basis of a unique module: E-mail management module (log analysis). Now based on web 2.0 technologies (ExtJS 4.1) and devel restarted because of a particular...
    Downloads: 0 This Week
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  • 15
    Bubbles

    Bubbles

    Bubbles the simple, easy to use HTTP web server, browser controlled

    Bubbles the simple, easy to use HTTP web server that is browser controlled, and capable of serving static files over the internet, either streamed from disk, or direct from RAM without lag. A GUI administration panel is accessed through your web browser (e.g. "http://localhost:1080/admin/" + default password of "admin"), which controls all her settings and vital functions, all in real time. Apart from serving files, she is capable of tracking site visits (site counters), receiving...
    Downloads: 0 This Week
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  • 16
    Easy Mailer: Bulk Email/SMS Sender

    Easy Mailer: Bulk Email/SMS Sender

    EasyMailer: Bulk Email/SMS Sender Using SMTP

    EasyMailer is a powerful and user-friendly software designed to streamline the process of sending bulk emails or SMS messages effortlessly via SMTP (Simple Mail Transfer Protocol). With its intuitive interface and robust features, EasyMailer simplifies communication campaigns for businesses, organizations, and individuals alike. System Requirements: Operating System: Windows RAM: Minimum 512MB ROM: Minimum 256MB
    Downloads: 4 This Week
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  • 17
    plutoemail

    plutoemail

    Email reader for RISC OS operating system.

    Pluto is an email and newsgroup reader for the RISC OS operating system (see https://www.riscosopen.org/), developed by Jonathan Duddington from 1997 to 2004. It stores emails and news articles in Boxes, and they can be Listed, Viewed, Written, Spell checked, Replied to, Searched and even Spoken out loud! After Pluto was released under GPLv3 here on SourceForge in 2013, it has had many improvements.
    Downloads: 1 This Week
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  • 18

    gross

    Gross greylisting server

    Gross is a greylisting server. The features that make gross stand out from other greylisters are: - it's blazingly fast - it's amazingly resource efficient - it can be configured to query DNSBL databases, and enforce greylisting only for hosts that are found on those databases - it can block hosts that match multiple DNSBL's - it can be replicated and run parallel on two servers - It supports Sun Java System Messaging Server, Postfix, Sendmail and Exim.
    Downloads: 2 This Week
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  • 19
    Oblivion-Inverse

    Oblivion-Inverse

    Open source e-mail tracker made with Flask, setup & run in 10 minutes

    ...Designed to provide information about the email read status, time, IP address of the recipient's device or proxy, as well as request headers such as the user-agent, which can reveal details about the recipient's browser, operating system, and device. Generate tracking links for your emails and drag the tracking pixel to the end of the message body. Includes detailed documentation that offers step-by-step instructions on how to set up and use the tool, as well as information on contributing to the development. The project is based on Flask, python and is easy to set up. ...
    Downloads: 0 This Week
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  • 20
    Mailfilter

    Mailfilter

    Remote anti spam utility

    Mailfilter is a flexible utility for UNIX (-like) operating systems to get rid of unwanted spam mails, before having to go through the trouble of downloading them into the local computer. It offers support for one or many POP accounts.
    Downloads: 0 This Week
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  • 21

    SendMail

    SendMail is a simple program that can send e-mails via SMTP protocol.

    SendMail is a simple program that can send e-mails via SMTP protocol. It is created using C# and is only available for Windows operating system. .NET Framework 4.8 is required to run the program.
    Downloads: 12 This Week
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  • 22
    The LDAP proxy is designed to be the part of the email encryption infrastructure which would simplify finding and using public encryption keys contained in X.509 public certificates.
    Downloads: 0 This Week
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  • 23
    Elastix

    Elastix

    Unified Communications Server

    Elastix is a software-based PBX powered by 3CX and based on Debian. An open-standards solution, Elastix is an easy to install and manage UC system compatible with popular IP phones, gateways and SIP trunks. Elastix is complete with unified communications features such as integrated WebRTC video conferencing, chat, presence and softphones and smartphone clients for Windows, Mac, iOS and Android.
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    Downloads: 89 This Week
    Last Update:
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  • 24
    AAMDirect II
    A.A.M Direct (formerly NNTP A.A.M Client) is a type of email system whereby two or more people can communicate privately and/or anonymously with strong encryption . It uses the alt.anonymous.messages news group and does not require a usual email address setup. Messages are sent to the news group directly or through the Tor network. Note: If you have AAMDirect II already installed, just download the AAMDirect.exe and replace the old executable. Rename the old executable first and...
    Downloads: 0 This Week
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  • 25
    This is a simple web tool which allows users of a website to "securely" submit messages and files. They are sent over HTTPS to the server and there encrypted and forwarded to the administrator.
    Downloads: 0 This Week
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