Z-Push - Leading Open Source Push Synchronization

•    PHP

Z-Push is an open-source application to synchronize ActiveSync compatible devices such as mobile phones, tablets and Outlook 2013 and above. With a history of over 9 years of successful synchronization with multiple backends Z-Push is the leading open source push synchronization.

csync2 - cluster synchronization tool

•    C

Csync2 is a cluster synchronization tool. It can be used to keep files on multiple hosts in a cluster in sync. Csync2 can handle complex setups with much more than just 2 hosts, handle file deletions and can detect conflicts. It is expedient for HA-clusters, HPC-clusters, COWs and server farms.

redux-electron-store - ⎋ A redux store enhancer that allows automatic synchronization between electron processes

•    Javascript

This library solves the problem of synchronizing Redux stores in Electron apps. Electron is based on Chromium, and thus all Electron apps have a single main process and (potentially) multiple renderer processes, one for each web page. redux-electron-store allows us to define a store per process, and uses ipc to keep them in sync. It is implemented as a redux store enhancer. This library only works if the data in your store is immutable, as objects are compared by reference to determine changes. The data being synchronized must also be pure JavaScript objects.

GUN - A realtime, decentralized, offline-first, graph database engine

•    Javascript

GUN is a realtime, distributed, offline-first, graph database engine. Lightweight and powerful. GUN does state synchronization out of the box. It is peer-to-peer by design, meaning you have no centralized database server to maintain. It has offline support, works even without internet. Users can save data offline and when when the network comes back online GUN will automatically synchronize the data.

EarlGrey - :tea: iOS UI Automation Test Framework

•    Objective-C

EarlGrey is a native iOS UI automation test framework that enables you to write clear, concise tests.With the EarlGrey framework, you have access to enhanced synchronization features. EarlGrey automatically synchronizes with the UI, network requests, and various queues; but still allows you to manually implement customized timings, if needed.

eventsourced - A library for building reliable, scalable and distributed event-sourced applications in Scala

•    Javascript

In other words, Eventsourced implements a write-ahead log (WAL) that is used to keep track of messages an actor receives and to recover its state by replaying logged messages. Appending messages to a log instead of persisting actor state directly allows for actor state persistence at very high transaction rates and supports efficient replication. In contrast to other WAL-based systems, Eventsourced usually keeps the whole message history in the log and makes usage of state snapshots optional. Logged messages represent intended changes to an actor's state. Logging changes instead of updating current state is one of the core concept of event sourcing. Eventsourced can be used to implement event sourcing concepts but it is not limited to that. More details about Eventsourced and its relation to event sourcing can be found at How does Eventsourced persist actor state and how is this related to event sourcing.

FullSync - File Synchronization and Backup Tool

•    Java

FullSync is a universal file synchronization and backup tool which is highly customizable and expandable. It is especially for developers, but the basic functionality is easy enough for everyone. It supports multiple protocols like FTP, SFTP, SMB/CIFS(Windows Shares) and local files, Scheduled execution of synchronizations using intervals or a crontab like scheduling. Publication and update of websites, synchronization of local directories and making backups of your data.

Scalable state synchronization infrastructure using P2P

An infrastructure that provides synchronization between peers using WCF P2P.Many applications need to share information between various instances of the application. This infrastructure simplifies the use of peer channel by handling the various patterns of nodes states. Imp...

FairyGUI-unity - A flexible UI framework for Unity

•    CSharp

By using FairyGUI Editor, you can build a variety of complex game interface without writing code or any configuration files. Support Unity、Cocos2dx、Cry Engine、 Havok Vision/Project Anarchy、Egret、LayaAir、Haxe、Pixi、Flash、Starling，and Unreal、LibGDX、Three.js in the future. Compared with traditional Unity UI engines such as NGUI and UGUI, FairyGUI uses a way of thinking closer to the designer to redefine the production process of the UI, which greatly reduces the time the programmer needs to invest in making the UI.

Unison - File synchronization tool for Unix and Windows

•    C++

Unison is a file-synchronization tool for Unix and Windows. It allows two replicas of a collection of files and directories to be stored on different hosts (or different disks on the same host), modified separately, and then brought up to date by propagating the changes in each replica to the other. Unlike simple mirroring or backup utilities, Unison can deal with updates to both replicas of a distributed directory structure. Updates that do not conflict are propagated automatically.

LSC engine - LDAP Synchronization Connector

•    Java

Ldap Synchronization Connector reads from any data source including databases, LDAP directories or files and transforms and compares this data to an LDAP directory. These connectors can then be used to continuously synchronize a data source to a directory, for a one shot import or just to compare differences by outputting CSV or LDIF format reports.

brig - A file synchronization tool on top of ipfs (and more!)

•    Go

brig is a distributed & secure file synchronization tool with version control. It is based on ipfs, written in Go. It supports Simplified git version control, Sync algorithm that can handle moved files and empty directories and files, Encryption of data in rest and transport + compression on the fly and lot more.

Maple.js - WebSocket based Multiplayer Architecture for Node.js

•    Javascript

Maple.js aims to provide a simple way to write a event based, realtime multiplayer game running in the Browser. Maple is best suited for games with low requirements on latency and high requirments on synced state. It ensures synced time and random number values for both server and client on every frame*.

fossa - Async non-blocking multi-protocol networking library for C/C++

•    C

Fossa is a multi-protocol networking library written in C. It provides easy to use event-driven interface that allows to implement network protocols or scalable network applications with little effort. Fossa helps developers to manage the complexity of network programming and let them concentrate on the logic, saving time and money. Fossa has built-in support for several protocols, like HTTP, Websocket, MQTT, mDNS. Example applications include Websocket-based chat server, JSON-RPC server, database server with RESTful API, MQTT broker, netcat with SSL and hexdump, Raspberry PI camera video feed + led control, and more.

kivent - KivEnt is an entity-based game engine for Kivy

•    Python

KivEnt is a framework for building performant, dynamic real-time scenes in Kivy for Python2 and Python3. At the moment it is 2d oriented. The only dependency for the kivent_core module is Kivy itself. Additional modules may have other requirements, such as kivent_cymunk module being based on Chipmunk2d and its cymunk wrapper. An entity-component architecture is used to control game object state and the logic of processing the game objects. This means that your game objects will be made up of collections of independent components that stricly hold data; each component corresponds to a GameSystem that will perform all data processing on the components, in the update loop each frame, and as a result of user interaction or other programmaticaly generated events. All memory for the built-in components is allocated statically: if you would like learn more about memory management, read here.

NoahGameFrame - A fast, scalable, distributed game server engine/framework for C++, include actor library, network library,can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal

•    CSharp

NoahGameFrame (NF) is a lightweight, fast, scalable, distributed plugin framework. NF is greatly inspired by OGRE and Bigworld.

eXtensible MUD

•    Java

XMUD is a MMORPG implementation in Java. Players can extend the system by creating new objects. The game provides a 3D engine written in Java3D, Persistent state management, synchronization and networking subsystems. Compatible with NWN modules.

csync - A professional file synchronizer for normal users

•    C

sync is a lightweight utility to synchronize files between two directories on a system or between multiple systems. It synchronizes bidirectionally and allows the user to keep two copies of files and directories in sync. csync uses widely adopted protocols, such as smb or sftp, so that there is no need for a server component. It is a user-level program which means you don’t need to be a superuser or administrator.

Nomad WebSync

Synchronization data from Pocket Outlook to a remote webservice, with a Windows WCF interface for access and manipulation of the data on server

X-Itools: Enterprise Collaboration

•    Javascript

Enterprise Collaboration modules and strong Log Analysis modules