Alternatives to EssentialPIM for Linux with any license

Lightning Calendar

Organize your schedule and events in a calendar fully integrated with Thunderbird or Seamonkey email. .

Free Open Source Mac Windows Linux Thunderbird SeaMonkey
CalDAV CardDAV Add a feature

157 Like
Evolution

Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list...

Free Open Source Linux BSD S/MIME GNOME OpenPGP
Built-in RSS reader CalDAV Calendar integration CardDAV ... Encrypted email Integrated Spam Protection Multiple languages POP3 Support Add a feature

150 Like
Quire

Quire is a new-generation collaborative task management tool for organizing tasks in a tree-like structure wrapped in simple and user-friendly UI. Its unique visual...

Free Mac Windows Linux Web Android ... iPhone Android Tablet iPad Chrome
Hierarchical structure Subtasks Google Chrome extension Cloud sync ... Drag n drop Sync with Google Calendar Google Drive integration Multiple Languages Real time collaboration Team Collaboration Add a feature

93 Like
RedNotebook

RedNotebook is a graphical diary and journal helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export...

Free Open Source Mac Windows Linux PortableApps.com Xfce
Auto-saving Add a feature

98 Like
Geary

Geary is an email application built for GNOME 3. It allows you to read and send email with a simple, modern interface.

Free Open Source Linux BSD GNOME
No features added Add a feature

70 Like
Org mode

Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.

Free Open Source Mac Windows Linux
Customizable Command line interface Emacs integration Export to HTML ... Extensible by Plugins/Extensions Hierarchical structure Hierarchical tagging Infinite hierarchical depth Lightweight Plain text file Portable Privacy focused Search by tags Tag based Add a feature

65 Like
Task Coach

Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists. It is designed for composite tasks, and also offers effort tracking...

Free Open Source Mac Windows Linux iPhone BSD ... iPad PortableApps.com
Portable Add a feature

118 Like
Todo.txt

Track your tasks and projects in a plain text file, todo.txt. A todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and...

Free Open Source Mac OS X Windows Linux Android iPhone ... Android Tablet BSD iPad
Command line interface Portable Add a feature

55 Like
Restyaboard

Open source Trello-like kanban board. Based on Restya platform.

Freemium Open Source Linux Web Self-Hosted
Gantt-charts Kanban boards Works Offline Real time collaboration Add a feature

51 Like
TreeSheets

The ultimate replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases. Suitable for any kind of data organization, such as To-do...

Free Open Source Mac OS X Windows Linux
No features added Add a feature

51 Like
Kontact - KMail

KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for...

Free Open Source Mac OS X Windows Linux BSD
No features added Add a feature

32 Like
Kontact

Kontact is the integrated Personal Information Manager of KDE. Kontact suite unites mature and proven KDE PIM applications under one roof. Thanks to the powerful...

Free Open Source Windows Linux
Convert Email to Task Add a feature

25 Like
Nitro

Super awesome task management. Nitro is the best way to get things done. It's simple, fast and powerful at the same time. Nitro also syncs with Dropbox or Ubuntu...

Free Open Source Mac OS X Linux Web
No features added Add a feature

25 Like
- Discontinued Latest commit d44b5db on Mar 29, 2014: https://github.com/CaffeinatedCode/nitro
Zimbra Desktop

The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud...

Free Personal Mac OS X Windows Linux
No features added Add a feature

29 Like
GeeTeeDee

GeeTeeDee is a fancy, lightweight, easy to use and effective task management software.

Free Mac OS X Windows Linux
Lightweight Portable Add a feature

18 Like
- Discontinued The program is no longer updated. Last versions, released in December 2014, can be still downloaded from the official website.