Best Open Source Windows Post-Office Software 2025

Post-Office Software for Windows

Post-Office Windows Security Clear Filters

Browse free open source Post-Office software and projects for Windows below. Use the toggles on the left to filter open source Post-Office software by OS, license, language, programming language, and project status.

Monitor your whole IT Infrastructure
Know what's up and what's new: Monitor all your systems, devices, traffic and applications.

Caters to tech staff, system Administrators, and companies of any size, from small and medium sized businesses to enterprises that need their IT network to be reliable and easy to monitor in real-time. Equipped with an easy-to-use, intuitive interface with a cutting-edge monitoring engine. PRTG optimizes connections and workloads as well as reducing operational costs by avoiding outages while saving time and controlling service level agreements (SLAs).

Start Your Free PRTG Trial Now
Run applications fast and securely in a fully managed environment
Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of scalable infrastructure.

Run frontend and backend services, batch jobs, deploy websites and applications, and queue processing workloads without the need to manage infrastructure.

Try for free
1

Cassiopeia's BitMail

Encrypting E-Mail Client

BitMail is a Proof-of-Concept- / Design-Study for an Qt E-Mail Client. POP3 / IMAP / SMTP / P2P E-Mail-Client. ● Qt E-Mail Client. ● Build-in Encryption to secure E-Mails ● IMAP & POP3 ● Additionally a full decentral P2P Email-Option via the Echo Protocol ● Store Email for Offline-Friends in the P2P Network. ● Chat and Instant Messaging is build in. ● POPTASTIC function (Chat over Email) ● Calendar widget functionality. ● Open Source. BSD License. "Cassiopeia is the tortoise of Momo, which can communicate through writing on her shell and guides into the future." - Wikipedia. Source from: https://sf.net/projects/spot-on/files/ & https://github.com/textbrowser/spot-on

Downloads: 4 This Week

Last Update: 2017-12-27
See Project
2

ClamMail

ClamMail is POP3 email proxy for Windows with integrated ClamAV antivirus engine. ClamMail is an Windows antivirus that protects your PC from viruses transferred via mail. Works with Outlook,Thunderbird,Eudora and many others using popular POP3 protocol

Downloads: 2 This Week

Last Update: 2013-04-01
See Project
3

AirDrive

AirDrive is a file storage utility that uses the storage capacity of linked IMAP enabled email accounts for file storage with an FTP-like interface.

Downloads: 0 This Week

Last Update: 2013-04-29
See Project
4

ImpraStorage

ImpraStorage provided a private imap access to store large files

ImpraStorage provided a private imap access to store large files. Each file stored on the server is split in severals random parts. Each part also contains random noise data (lenght depends on a crypt key) to ensure privacy and exclude easy merge without the corresponding key. An index of files stored is encrypt (with the symmetric-key algorithm Kirmah) and regularly updated. Once decrypt, it permit to perform search on the server and download each part. transfert process is transparent. Just vizualize locally the index of stored files and simply select files to download or upload. ImpraStorage automatically launch the parts to download, then merge parts in the appropriate way to rebuild the original file. Inversely, a file to upload is split (in several parts with addition of noise data), and ImpraStorage randomly upload each parts then update the index.

Downloads: 0 This Week

Last Update: 2016-09-16
See Project
The All-in-One Commerce Platform for Businesses - Shopify
Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.

Learn More
5

creadpag

this tool hack facebook account

Downloads: 0 This Week

Last Update: 2017-02-16
See Project
6

paranoy

a fast email client for console that support pop3 and smtp protocols also with ssl connections and more paranoic futures...

Downloads: 0 This Week

Last Update: 2013-02-21
See Project