Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
It supports POP (storing mail locally on your hard drive so that it can be accessed without an internet connection), and IMAP. It features excellent mail filter capabilities and management.
Thunderbird has strong support for using multiple accounts and identities, including automated signature features.
Chat functionality is built in, so you can enjoy real-time conversation with your contacts, right from your favorite messaging application, with multiple supported networks. Thunderbird makes it easy to search through both past conversations and received emails.
Thunderbird can also function as an RSS/Atom feed reader, and has a large selection of add-ons that extend it with calendar support, PGP support, integration with online services and much more.
Available also as portable app: http://portableapps.com/apps/internet/thunderbird_portable
You should have full control over your data. We help you achieve that: a safe home for all your data. Secure, under your control and developed in an open, transparent and trustworthy way. We are Nextcloud.
Started by the well known open source file sync and share developer Frank Karlitschek and joined by the most active contributors to his previous project, building on its mature code base, we offer a more reliable and sustainable solution for users and customers. We will develop a drop-in replacement for that legacy code base over the coming weeks, providing the bug fixes and security hardening all users need and the Enterprise Subscription capabilities enterprise customers require, all fully open source.
An Open Source business model depends on a carefully balanced equilibrium between the needs of a business and its customers, users and contributing community. Nextcloud is a reboot of the most popular open source file sync and share solution, a new way of re-defining the balance into a more sustainable, open ecosystem with a single focus: putting users in control of their data. Kickstarted as a healthy, growing company, Nextcloud reduces barriers to contribution and increases transparency to enable more input of customers and users.
On top of the file sync and share you all know and love, Nextcloud will provide full Spreed.ME support. Spreed.ME is a next generation, open source WebRTC based communication platform with video conferencing and text chat. We will also provide support for the popular Calendar and Contacts apps and improve and enrich the user experience in many other areas.
New energy and greater ambitions for the future: Nextcloud is the next generation of on-premise cloud technology! You can find more information about our plans in our blogs and we'll update our website continuously.
QOwnNotes is the open source plain-text notepad with markdown support and todo-list manager for Linux, Mac OS X and Windows, that works together with the notes application of ownCloud.
So you are able to write down your thoughts with QOwnNotes and edit or search for them later from your mobile device (like with CloudNotes) or the ownCloud web-service.
The notes are stored as plain text files and are synced with ownCloud's file sync functionality. Of course other software, like Dropbox, can be used too.
I like the concept of having notes accessible in plain text files, like it is done in the ownCloud notes app, to gain a maximum of freedom, but I was not able to find a decent desktop note taking tool or a text editor, that handles them well in conjunction with ownCloud.
Out of this need QOwnNotes was born.
KeePassXC is a community fork of KeePassX, the cross-platform port of KeePass for Windows. Every feature is cross-platform and tested to give users the same feel on each operating system, including the loved auto-type feature.
The complete database is always encrypted with the AES (alias Rijndael) encryption algorithm using a 256 bit key. KeePassXC uses a database format that is compatible with KeePass Password Safe. Your wallet always works offline and requires no Internet connection.
The source code is published under the terms of the GNU General Public License. KeePassXC is and always will be free as in freedom as well as in beer. Contributions from everyone are welcome.
FileZilla is a powerful FTP-client. It has been designed for ease of use and with support for as many features as possible, while still being fast and reliable. The program offers support for firewalls and proxy connections as well as SSL and Kerberos GSS security.