Open Source C Internet Software
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C Internet Software
View 8895 business solutionsBrowse free open source C Internet Software and projects below. Use the toggles on the left to filter open source C Internet Software by OS, license, language, programming language, and project status.
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Build Agents and Models on One PlatformGemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
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Go from Code to Production URL in SecondsSkip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
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Tcl
The Tool Command Language implementation
Tool Command Language (Tcl) is an interpreted language and very portable interpreter for that language. Tcl is embeddable and extensible, and has been widely used since its creation in 1988 by John Ousterhout. Bug reports to http://core.tcl.tk/tcl/ Follow code development at http://core.tcl.tk/tcl/ -
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WindTerm
A professional cross-platform SSH/Sftp/Shell/Telnet/Serial terminal
A Quicker and better SSH/Telnet/Serial/Shell/Sftp client for DevOps. WindTerm is a partial open source project, and the source will be gradually opened. Open source code includes, but is not limited to, the classes that can be used independently, such as functional, algorithms, GUI widgets, etc., as well as functional libraries, such as networks, protocols, etc., as well as all types that require open source according to the license. SSH v2, Telnet, Raw TCP, Serial, Shell protocols were implemented. Supports SSH auto-execution when the session is authenticated. Integrated local file manager, supports the move to, copy to, copy from, remove, rename, make new file/directory and so on. Supports Windows Cmd, PowerShell and Cmd, PowerShell as administrator. Supports Linux bash, zsh, PowerShell core, and so on. Supports MacOS bash, zsh, PowerShell core, and so on. -
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Net-SNMP provides tools and libraries relating to the Simple Network Management Protocol including: An extensible agent, an SNMP library, tools to request or set information from SNMP agents, tools to generate and handle SNMP traps, etc.
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Proton VPN for Android
ProtonVPN Android app
The Proton VPN app for Android is intuitive to use, offers lots of useful features, and keeps you secure and private when surfing the internet. Once the app is installed, open it and log in with your Proton VPN username and password. If you are a Proton Mail user, you can access the Proton VPN Free plan by logging in with your Proton Mail username and password. Touch the Quick Connect button to automatically connect to the fastest VPN server for your location. You can also choose to connect to any specific server that is available on your plan. You can now securely and privately browse the internet. The datat traveling between your device and the VPN server is encrypted. Secure Core protects your connection by routing your traffic through multiple servers before it leaves our network, defending you against advanced, network-based attacks. -
Earn up to 16% annual interest with Nexo.Generate interest, borrow against your crypto, and trade a range of cryptocurrencies — all in one platform. Geographic restrictions, eligibility, and terms apply.
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Zero Install is a decentralised cross-distribution software installation system. Create one package that works everywhere! With dependency handling and automatic updates, full support for shared libraries, and integration with native package managers
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VTun is the easiest way to create Virtual Tunnels over TCP/IP networks with traffic shaping, compression, and encryption. It supports IP, Ethernet, PPP and other tunnel types. VTun is easily and highly configurable. VPN, Mobile IP, Shaping, etc
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Zapret
Advanced open source tool for bypassing DPI-based censorship
Zapret is an open source, cross-platform tool designed to help users bypass and evade Deep Packet Inspection (DPI)-based traffic blocking and censorship systems. Rather than acting as a traditional proxy or VPN, it works by manipulating network packets and traffic streams locally to confuse or disrupt DPI mechanisms used by ISPs and network filters, making it possible to access restricted websites and services without relaying traffic through third-party servers. Zapret implements multiple strategies including desynchronizing DPI inspection, packet modification, and protocol manipulation to make network traffic less recognizable or harder for DPI systems to classify reliably. It supports deployment on a variety of operating systems including traditional Linux systems, embedded devices like routers running OpenWRT, and has partial support for FreeBSD, OpenBSD, macOS, and Windows. -
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Termux:X11
Termux X11 add-on application
Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required. A minimal base system is installed automatically - additional packages are available using the APT package manager. Termux combines standard packages with accurate terminal emulation in a beautiful open-source solution. Access API endpoints with curl and use rsync to store backups of your contact list on a remote server. -
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Zint Barcode Generator
A barcode encoding library supporting over 50 symbologies.
Encodes data into any of the following: Australia Post, Aztec Code & Runes, BC412, Channel, Codabar, Codablock-F, Code 11, Code 128, Code 16K, Code 2 of 5 (incl. IATA, Interleaved, Data Logic, ITF-14, Deutsche Post Leitcode & Identcode), Code 32 (Italian Pharmacode), Code 39, Code 39+, Code 49, Code 93, Code One, DAFT, Data Matrix (incl. DMRE), DotCode, DPD, Dutch Post KIX, EAN, FIM, Flattermarken, Grid Matrix, GS1 DataBar (incl. stacked & GS1 Composite symbols), GS1-128, Han Xin, HIBC, ISBN, Japan Post, Korea Post, LOGMARS, MaxiCode, NVE-18 ( SSCC-18), PDF417 & MicroPDF417, Pharmacode, PLANET, POSTNET, Plessey (MSI & UK), PZN, QR Code, Micro QR & rMQR, Royal Mail RM4SCC & Mailmark, Telepen, Ultracode, UPC-A, UPC-E, UPNQR, UPU S10, USPS Intelligent Mail and VIN. Automated ECI switching to support all Unicode characters and automated FNC1 character insertion in GS1 mode. Save to BMP, EMF, EPS, GIF, PCX, PNG, SVG and TIF. Includes CLI, GUI and API for calling from other applications. -
99.99% Uptime for MySQL and PostgreSQL DatabasesCloud SQL Enterprise Plus delivers near-zero downtime with 35 days of point-in-time recovery. Supports MySQL, PostgreSQL, and SQL Server.
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UFTP
Encrypted UDP based FTP with multicast
UFTP is an encrypted multicast file transfer program, designed to securely, reliably, and efficiently transfer files to multiple receivers simultaneously. This is useful for distributing large files to a large number of receivers, and is especially useful for data distribution over a satellite link (with two way communication), where the inherent delay makes any TCP based communication highly inefficient. The multicast encryption scheme is based on TLS with extensions to allow multiple receivers to share a common key. UFTP also has the capability to communicate over disjoint networks separated by one or more firewalls (NAT traversal) and without full end-to-end multicast capability (multicast tunneling) through the use of a UFTP proxy server. These proxies also provide scalability by aggregating responses from a group of receivers. -
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DNS2SOCKS
DNS to SOCKS or HTTP proxy
This is a command line utility to resolve DNS requests via a SOCKS tunnel like Tor or a HTTP proxy. -
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A tiny (<30K) cgi wrapper that uses a UNIX shell or a Lua VM to provide PHP-like scripting for dynamic web content. It transparently parses form data, including mime-formatted file uploads.
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SlipNet
Android VPN client with DNS tunneling (DNSTT, NoizDNS & Slipstream)
SlipNet is an anti-censorship and tunneling project centered on an Android VPN client with additional command-line support for desktop platforms. It can route traffic through multiple tunnel types, including DNS tunneling, SSH, SOCKS5, NaiveProxy, Tor, and related transport methods. The project is designed for networks where ordinary traffic may be blocked, throttled, filtered, or inspected. SlipNet includes a built-in DNS scanner, which helps users identify usable DNS paths for supported tunnel modes. Its desktop CLI can read configuration URIs and start a local SOCKS5 proxy for applications that need proxy-based routing. SlipNet is best understood as a multi-transport connectivity toolkit rather than a single-protocol VPN client. -
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Expat XML Parser
Fast XML parser library in C
PLEASE NOTE that we are in the process of moving to GitHub: https://github.com/libexpat/libexpat This is James Clark's Expat XML parser library in C. It is a stream oriented parser that requires setting handlers to deal with the structure that the parser discovers in the document. PLEASE NOTE that we are in the process of moving to GitHub: https://github.com/libexpat/libexpat -
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WireGuard for iOS and macOS
An application for iOS and for macOs
WireGuard for iOS and macOS is the official WireGuard client implementation for Apple platforms, including iOS, iPadOS, and macOS. The project delivers a native Swift-based application that integrates with Apple’s Network Extension framework to provide secure VPN tunneling with strong performance and reliability. It offers a polished graphical interface that allows users to create, import, and manage WireGuard configurations while maintaining the protocol’s emphasis on simplicity and modern cryptography. The software is designed to work seamlessly within Apple’s ecosystem, supporting keychain storage, system networking controls, and platform security features. Because WireGuard is known for its lean architecture, the Apple client maintains efficient resource usage while delivering fast connection speeds. Overall, wireguard-apple is intended for Apple device users and organizations that require a secure, modern VPN solution fully aligned with the Apple networking stack. -
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The GNU netcat
The networking swiss army knife
A rewrite of the well-known networking tool, but more portable, with new features and fully GNU compliant. -
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WireGuard
Historical monolithic WireGuard repository
WireGuard is an archived repository that preserves earlier monolithic development snapshots of the WireGuard project for historical and reference purposes. It reflects a previous stage in WireGuard’s evolution before the codebase was modularized into the modern multi-repository structure used today. The repository is valuable primarily for researchers, maintainers, and security analysts who want to study the protocol’s design history, implementation changes, or legacy behavior. Although not intended for production use, it provides insight into how WireGuard’s minimalist architecture and cryptographic approach matured over time. The project forms part of the broader WireGuard ecosystem, which focuses on delivering a simpler and faster VPN compared to legacy solutions. In practice, most users should rely on the actively maintained repositories, while this historical mirror serves educational and archival needs. -
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TeraTerm Project is developing the terminal emulator Tera Term and the SSH compatible extension module TTSSH. This is open source software under the BSD license. This is the official successor to the original Tera Term Pro 2.3. Development takes place on the project page on GitHub.
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Uniform Server
A free lightweight Windows Apache MySQL and PHP Server Solution.
Uniform Server is a free lightweight WAMP server solution for Windows. Build using a modular design approach, it includes the latest versions of Apache, MySQL or MariaDB, PHP (with version switching), phpMyAdmin or Adminer. No installation required! No registry dust! Just unpack and fire up! ------- Note: The latest version of Uniform Server requires a **64-bit version** of Windows. ------- -
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uGet, the Best Download Manager for Linux. uGet is a lightweight yet powerful Open Source download manager for GNU/Linux developed with GTK+, which also comes packaged as a portable Windows app. - Quick Links - Features: https://ugetdm.com/features Screenshots: https://ugetdm.com/screenshots Blog: https://ugetdm.com/blog Support: https://ugetdm.com/qa Frequently Asked Questions (FAQs): https://ugetdm.com/qa/faq RSS Feed: https://ugetdm.com/rss GitHub: https://github.com/ugetdm
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Poptop is an open source implementation of a PPTP server. Running under x86 or embedded Motorola ColdFire architectures Poptop provides full interoperability with the Microsoft PPTP VPN client.
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MultiThreaded TFTP Server Open Source Freeware Windows/Unix for PXEBOOT, firmware load, support tsize, blksize, timeout Server Port Ranges, Block Number Rollover for Large Files. Runs as Service/daemon. Single Port version also available. Download
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net-tools
Linux networking base tools
A collection of programs that form the base set of the NET-3 networking distribution for the Linux operating system. Includes: arp, hostname, ifconfig, netstat, rarp, route, plipconfig, slattach, mii-tool and iptunnel and ipmaddr. A mirror of the sourcecode is available on https://github.com/ecki/net-tools -
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A client for automaticly updating your EZ-IP.net, justlinux.com, dhs.org, dyndns.org, ods.org, gnudip.cheapnet.net, tzo.com, easydns.com dynamic hostname parameters. Includes daemon support that only sends updates if your IP address changes.
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SoftEther VPN
Cross-platform multi-protocol VPN software
An open-source free cross-platform multi-protocol VPN program, as an academic project from University of Tsukuba, under the Apache License 2.0. The API Suite allows you to easily develop your original SoftEther VPN Server management application to control the VPN Server (e.g. creating users, adding Virtual Hubs, disconnecting a specified VPN sessions) from JavaScript, TypeScript, C# or other languages. SoftEther VPN ("SoftEther" means "Software Ethernet") is one of the world's most powerful and easy-to-use multi-protocol VPN software. It runs on Windows, Linux, Mac, FreeBSD and Solaris. SoftEther VPN is an optimum alternative to OpenVPN and Microsoft's VPN servers. SoftEther VPN has a clone-function of OpenVPN Server. You can integrate from OpenVPN to SoftEther VPN smoothly. SoftEther VPN is faster than OpenVPN. SoftEther VPN also supports Microsoft SSTP VPN for Windows Vista / 7 / 8. No more need to pay expensive charges for Windows Server license for Remote-Access VPN function.
