Kalkun

•    Javascript

Kalkun is a simple web-based SMS (Short Message Service) management, it use gammu-smsd (part of gammu family) as SMS gateway engine to deliver and retrieve messages from your phone/modem.

playSMS - PHP based SMS Gateway

•    PHP

playSMS is a flexible Web-based Mobile Portal System that it can be made to fit to various services such as an SMS gateway, personal messaging systems, corporate and group communication tools.

SMSj - Java SMS library

•    Java

This library allows you to send SMSes (GSM) from the Java platform. It gives you full control over the SMS including the UDH field so you can create and send EMS messages, WAP push messages and nokia smart messages (picture, ringtone etc). The API can send SMS by using a GSM phone connected to the serial port or via a SMS gateway (like Clickatell).

sms-backup-plus - Backup Android SMS, MMS and call log to Gmail / Gcal / IMAP

•    Java

This is a fork of the Android backup tool SMS Backup, where development has stopped a while ago. It uses Gmail to perform SMS, MMS and call log backups over the network. New restore feature. SMS stored on Gmail can be transferred back to the phone. This even works for users who have already created their backups with older versions of SMS Backup. Note: MMS are currently not restored.

SMSSync - SMS gateway for Android powered phones

•    Java

SMSsync is a simple, yet powerful SMS to HTTP sync utility that turns any Android phone into a local SMS gateway by sending incoming messages(SMS) to a configured URL (web service).

Notifire - Notification management simplified

•    Typescript

Building a notification system is hard, at first it seems like just sending an email but in reality it's just the beginning. In today's world users expect multi channel communication experience over email, sms, push, direct and more... An ever growing list of providers are popping up each day, and notifications are spread around the code. Notifire's goal is to simplify notifications and provide developers the tools to create meaningful communication between the system and it's users.

Listmonk - High performance, self-hosted newsletter and mailing list manager with a modern dashboard

•    Go

listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL database as its data store. It has been in active use at zerodha.com for several months where it has processed hundreds of campaigns and tens of millions of e-mails.

Send SMS

Send SMS allows you to send SMS (Short Messaging Service) to all mobile operators across India. It allows you to send SMS through popular service providers like Way2SMS, Full On Sms, Tezsms, Sms Inside and more.

SMSToolkit - .NET SMS server

•    CSharp

The SDK allows any Windows Mobile 5 phone to be used in conjunction with a PC to act as an SMS Server, allowing developers to easily write SMS applications, using just their phone and a PC. Additionally, it provides a collection of samples that among other things, allow non-programmers to use Excel to send bulk SMSs and to build simple information lookup applications. This project is actively developed by Microsoft India Research team.

Silence - SMS/MMS encryption made easy

•    Java

Silence (formerly SMSSecure) is an SMS/MMS application that allows you to protect your privacy while communicating with friends.Using Silence, you can send SMS messages and share media or attachments with complete privacy. It communicates using encrypted SMS messages. No servers or internet connection required. It uses the Signal encryption protocol to provide privacy for every message, every time.

sms-fu - Allows you to send an SMS using Ruby for FREE using an email to sms solution.

•    Ruby

Allows you to send an SMS using Ruby for FREE using an email to sms solution.

SmsTools - SMS Server Tools

•    C

The SMS Server Tools send and receive short messages through GSM modems or mobile phones. This tool can send short messages by simply storing text files into a special spool directory. The program monitors this directory and sends new files automatically. It also stores received short messages into another directory as text files.

PySMS - Python SMS Messenger

•    Python

PySMS is a package, written in Python, which communicates with a mobile phone, allowing SMS messages to be sent and received. It includes an XML- RPC server, allowing the resource to be shared across a network. There is also a message - response mechanism, which allows an automatic response to messages to be specified, based on the content of the message. This allows you to, for example, run commands on your server and return a summary of the results to your phone, via SMS.

SMSLib - Java SMS library

•    Java

SMSLib is a Java library which allows you to send/receive SMS messages via a compatible GSM modem or GSM phone. SMSLib also supports some bulk sms operators (for outbound messaging only).

Kannel - WAP and SMS gateway

•    C

Kannel is a compact and very powerful open source WAP and SMS gateway, used widely across the globe both for serving trillions of short messages (SMS), WAP Push service indications and mobile internet connectivity.

[GW]ammu - Talk to any phone

•    C

Gammu and Wammu provides support to talk to any phone using standard API provided by libGammu. The most popular and widely used in various phones which includes Nokia, Siemens, Samsung, Motorola, LG, Alcatel. It provides support to send and receive SMS and MMS, Calendar, Contacts, backup SMS etc.

Net::SMS::Web perl module

Net::SMS::Web - a perl module for sending SMS messages using web2sms gateways. Two subclasses are included: - Net::SMS::Mtnsms (http://www.mtnsms.com/) - Net::SMS::Genie (http://www.genie.co.uk/)

easy-sms - :calling: 一款满足你的多种发送需求的短信发送组件

•    PHP

:calling: 一款满足你的多种发送需求的短信发送组件

playSMS - playSMS is a flexible Web-based Mobile Portal System that it can be made to fit to various services such as an SMS gateway, personal messaging systems, corporate and group communication tools

•    PHP

playSMS is a free and open source SMS management software. playSMS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

smsonrails - Sms on Rails provides your app with instant SMS integration

•    Ruby

Sms on Rails provides your app with instant SMS integration