Console applications

Aggregators

newsboat : C++/Rust

RSS/Atom feed reader for text terminals

rss2email : Python

Converts RSS/Atom newsfeeds to email

urlwatch : Python

Watch changes in webpages or command output and get notified (via e-mail, in your terminal or through various third party services) of any changes

Bookmark managers

Buku : Python

Powerful bookmark management utility written in Python3 and SQLite3

Calendars & Contacts

khal : Python : calendar

Standards based CLI (console) calendar program

khard : Python : contacts

Console carddav client

Vdirsyncer : Python : sync

Synchronizes your calendars and addressbooks between two storages

Email

mbsync : C : sync

IMAP and MailDir mailbox synchronizer

Notmuch : C/C++ : index

Thread-based email index, search, and tagging

Clients

aerc : Go

Email client for your terminal

Alot : Python

Terminal-based mail user agent based on the Notmuch mail indexer

Mutt : C

Small but powerful text-based mail client for Unix operating systems

See also