Alacritty is a cross platform terminal emulator written in Rust that uses the GPU for rendering.

Features
* GPU rendering
* Unicode support
* Compiled-in powerline font
* Compatible with monospaced TTF/OTF fonts
* Font ligatures
* Themes
* Hints: Context-aware overlays (e.g. hex color viewer,
octal permission annotation)
* Take screenshots with a single key-binding
* Sixels
* Window transparency (0-100%)
* Customizable cursor (most popular image formats supported)

Features:

* Standards-compliant terminal emulation
* Basic customization -- fonts, bg colors, etc.
* Rich windowing features -- multi-window, tabbing, panes

Simple X11 terminal from the "suckless" project.

termit is a terminal emulator based on the vte library.

It includes tabs, bookmarks, and the ability to switch encodings.

It is extensible via Lua.

xiate uses VTE as the backend. It targets users who run window managers.

To configure settings, configure the “config.ini” file.

xvt is an X terminal-emulator that is designed to be more or less compatible
with xterm while using much less swap space. It is mainly intended for use at
sites which use large numbers of X terminals but may also be useful on single
workstations that are short of memory. The main way that xvt achieves its small
size is by avoiding the use of the X toolkit.

If you are looking for a more featureful terminal-emulator than xvt, but one
which still uses less swap space than xterm, consider rxvt-unicode.

Features of xterm which xvt does not support include:
- Tektronix 4014 emulation
- Session logging
- Pop-up menus. The only one of xterm's popup menu commands that
is provided in xvt is displaying and hiding of the scrollbar
and this is done simply by pressing any mouse key in the window
with the CONTROL key held down.
- Toolkit style configurability. In particular, xvt does not
allow the user to remap the mouse or keyboard keys.

Features which are supported include:
- VT100 emulation. Most of the main escape sequences are supported --
certainly all those used by the standard screen based UNIX
applications.
- Lines that scroll off the top of the window are saved and can be
scrolled back with a scrollbar.
- Text selection and insertion including double and triple click for
words and lines.

feh is a versatile and fast image viewer using imlib2, the
premier image file handling library. feh has many features,
from simple single file viewing, to multiple file modes using
a slideshow or multiple windows. feh supports the creation of
montages as index prints with many user-configurable options.

A program to capture screenshots. Features:

* Customizable appearance
* Annotation and drawing tools
* DBus interface
* Export to file, web

Output management utility for the sway and Hyprland Wayland compositors. Inspired by wdisplays and wlay.

A tiling window manager based on binary space partitioning.
* It only responds to X events, and the messages it receives on a dedicated socket.
* bspc is a program that writes messages on bspwm's socket.
* bspwm doesn't handle any keyboard or pointer inputs: a third party program (e.g. sxhkd) is needed in order to translate keyboard and pointer events to bspc invocations.

bumblebee-status is a modular, theme-able status line generator for the i3 window manager

ctwm is Claude Lecommandeur's extension to twm; in addition to the features of twm, it supports multiple virtual screens, the pixmap file format, pinnable ("sticky") menus, and other enhancements.

Echinus is a lightweight window manager for X based on dwm's source code. It
manages windows in tiled, maximized, and floating layouts. It is extremely
small, rather fast, and supports Xft. It features nice titlebars, multiple
desktops, theming support, a simple configuration file, the ability to switch
desktops with the mouse wheel, X bitmaps for title buttons, and true
transparency support (through xcompmgr). There is no need to recompile or
restart X to change its configuration.

euclid-wm is a minimalist tiling window manager for X11. It is designed to
allow quick and easy management of numerous windows entirely from
easy-to-learn, Vim-like key-bindings. It seeks to do two things in particular:
balance the ease of use common among automatic-layout tiling window managers
with the flexibility of manual layout window managers, and create a useful way
to handle minimized applications.

Hypr is a tiling window manager for Xorg

i3 is a tiling window manager.

fork of i3, a tiling window manager. gaps merged upstream since 4.22

i3lock is a screen locker like slock. After starting it, you will see a
white screen (you can configure the color/an image). You can return to
your screen by entering your password.

Notion is a tiling, tabbed window manager for the X window system. "Notion" is often stylized as "not ion", with reference to a prior window manager named "Ion", which in turn is based on "PWM."

* Tiling: you divide the screen into non-overlapping 'tiles'. Every window occupies one tile, and is maximized to it
* Tabbing: a tile may contain multiple windows - they will be 'tabbed'
* Static: most tiled window managers are 'dynamic', meaning they automatically resize and move around tiles as windows appear and disappear. Notion, by contrast, does not automatically change the tiling. You're in control.

Features include:

* Workspaces: each workspace has its own tiling
* Multihead: the mod_xinerama plugin provides very nice dual-monitor support
* RandR: mod_xrandr picks up changes in the xrandr configuration without the need for restarting Notion (read this, though)
* Extensibility: Notion can be extended with lua scripts. Browse through the scripts collection