Mailboxes synchronization tool; allows to download email locally; MailDir format supported.

Mail client which aims at being "fast, easy to use email client that is suitable for both the inexperienced email user as well as for the most demanding of power users".

"The Mutt of RSS Feed Readers": Newsbeuter is an open-source RSS/Atom feed reader for text terminals. It runs on Linux, FreeBSD, Mac OS X and other Unix-like operating systems. Newsbeuter's great configurability and vast number of features make it a perfect choice for people that need a slick and fast feed reader that can be completely controlled via keyboard.

Synchronizes a local copy of a website with a remote copy on a server; does not use SSH/scp but FTP for file copy; useful when the remote server does not support secure copy.

Mirror directories across networked machines; handles diffs/changed files; works across SSH; plenty of parameters.

"An open source tool that lets you securely and anonymously share a file of any size."

"Sophisticated ftp/http client, and a file transfer program supporting a number of network protocols"; support for bookmarks and mirroring features.

A lightweight, Free Software, cross-platform BitTorrent client; a terminal curses interface, web interface and command line client can connect to a running daemon to manage torrent downloads.

A tool and library for transferring data with URL syntax; supports a lot of protocols.

Curses front-end for Remind written in OCaml with vertically scrollable time table.

A comand line interface to manage hierarchical todos. Each task has a title, a long text description, a deadline (tudu warns you when the date is close), and a scheduled date. There are categories and priorities.

A minimal clone of Wunderlist, with 30% of its features. GTD oriented. It stores the task list in a hidden JSON file in the home directory, making it easy to backup or share them.

Minimalistic todo manager that uses a simple plain text file to keep track of items; implemented as a shell script.

Todo manager with advanced features; dedicated synchronization server available; many plugins and related tools; healthy software project.

Calendar program for Unix/Linux systems that can keep track of events; custom, plain text storage format; interesting and fully functional.

Dateutils are a bunch of tools that revolve around fiddling with dates and times in the command line with a strong focus on use cases that arise when dealing with large amounts of financial data.

termsaver to enjoy fancy ASCII screensavers like matrix, clock, starwars, and a couple of not-safe-for-work screens.

rtop is a simple, agent-less, remote server monitoring tool that works over plain SSH. Written in golang, it does not need any software to be installed on the server that you want to monitor. It works by establishing an SSH session, and running commands on the remote server to collect system metrics

PSSH provides parallel versions of OpenSSH and related tools. Included are pssh, pscp, prsync, pnuke, and pslurp. The project includes psshlib which can be used within custom applications

"ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range."