ABClock is a fully functional clock for Unix/X11. It has options to set colours and size.
AClock is a little application that shows the time of the day with an analog display. It acts as a dockapp when used with GNUstep.
Alarm Clock (formerly known as Alarm Applet) is a fully-featured open source alarm clock for your GNOME panel or equivalent. Read more
BDesktopClock is a simple clock for the Linux desktop environment.
binclock is a fullscreen console binary clock.
binclock is a simple ncurses program for displaying the time in binary numbers.
butler grandfather clock
butler grandfather clock plays audio files to report the time. The default configuration emulates a grandfather clock with Westminister chimes.
Clockywock is a cool analog clock for the Linux console
FClock is a quick digital clock hack with clean looks for docking in the fvwm button-bar.
FoxClocks is an extension for Firefox, Google Chrome, and Thunderbird that lets you keep an eye on the time around the world - or just your local time - by putting small clocks in your status bar. Read more
gkrellm Moon Clock
gkrellm Moon Clock is a Moon Clock plugin for Gkrellm.
gkrellm Sun Clock
gkrellm Sun Clock is a GKrellM plugin that displays information about the sun (sunrise/sunset times, solar path through the sky, etc.).
gkrellm Sun Clock is a GkrellM Plugin that shows the current UNIX timestamp like the default clock.
GKrellMEris is a Discordian Date plugin that, predictably, converts boring, normal dates into system of the Paratheo-anametamystikhood of Eris Esoteric.
Glock is a simple analog clock program. It is written in C and uses the GTK+ toolkit.
The original purpose of glock was to have a simple demo of an undecorated non-rectangular window using gtk_widget_shape_combine_mask(), moveable with the mouse using gtk_window_begin_move_drag().
glunarclock displays the current phase of the Moon as an applet for the gnome panel.
gtubeclock is a simple digital clock for GNOME/GTK+.
HDate-applet is an applet to show the hebrew date (calendar) using the libhdate library and the gnome-2.0 graphics library.
intclock provides a graphical multi-timezone clock that is customizable via a configuration window. It is based on hsclock.
intclock is an open source international (i.e. multi-timezone) graphical clock which can be run in a window or in a terminal. Read more
jbc stands for Jon's Binary Clock.
Kclock is a digital/analog clock for KDE.
KTimeWarp is a small KDE application that can display the time in different places of the world given their time difference with you.
MacSlow's Cairo Clock
MacSlow's Cairo Clock is an open source analog clock displaying the system time. Read more
MacSlow's Cairo-Clock is an analog clock displaying the system time. It leverages the visual features offered by Xorg 6.9/7.0 in combination with a compositing manager (e.g. xcompmgr), GTK+ 2.8.x, and Cairo 1.0.2 to produce a time display with pretty pixels.
mcountd is a incredibly simple program for displaying a count down clock in text-mode.
OSD Clock is a clock for X that uses xosd to render without frills and has formatting options available
PhrozenClock is a Date/Time application similiar to those found on KDE and Windoze. It is integrated into the IceWM Control Panel, but is also useful as the "clock" application for IceWM's taskbar clock.
pyAlarm is an alarm clock that plays MP3, Ogg, or whatever you want. It's intended for people suffering from some sort of sleeping disorder but is not a proper substitute for medical attention.
rglclock is a "rotating" 3D clock using GTK and Mesa/OpenGL. Rotating direction and speed can be changed by mouse drags.
rubiclox is an implementation of Rubik's clock. Rubik is the creator of the Rubik's cube.
Stickytime is a digital clock that also displays the current state of the stickykeys as set by an accessX program. Stickytime is also a simple stopwatch. Version 0.4 can display the current "mousekey" pointer button.
Sunwait is a small C program for calculating sunrise and sunset, as well as civil, nautical, and astronomical twilights. It has features that make it useful for home automation tasks.
tbclock is a small app that displays a full screen binary clock in your terminal (using curses). It is quite simple, and features modules like 'guessbin' (a little game) and 'chrono' (a timer with tenths of seconds).
tebsclock (Tamentis Enlightenment Steampunk Binary Clock) is a small gadget for the Enlightenment desktop shell. It does nothing but display the time in a binary and steampunk fashion. It can be resized in any way you want.
Tlhaq Klingon Clock
The Klingon clock is a neat desktop utilility designed to let you see the local time displayed in Klingon.
tty-clock is an analog clock in ncurses.
TzClock is an XWindows GTK+ graphical analog clock that can display the time around the world. It supports multiple faces showing different time zones. There is a stopwatch function that is accurate to a tenth of a second, and an alarm.
tzosdclock is a fork of xosd-clock, giving support for multiple timezones and detailed program args/options.
Wakeup is an open source fully customizable and extensible talking alarm clock. Read more
wmBinClock shows the actual system time as a binary clock. You have to add up the bits to get the time. The clock has a 24-hour format.
wmCalClockKbd is a simple calendar clock with integrated keyboard group indicator (for XFree86 >= 4.3.0). wmCalClockKbd can show actual time, date and keyboard group.
wmclock is a dock application for WindowMaker. When launched wmclock creates a 48 x 48 pixel analog clock within a 64 x 64 pixel tile.
WMFishTime features sexy gradient background, antialiased clock hands, alpha-blended bubbles, and cool fish swimming around behind the clock.
wmfuzzy is a WindowMaker dockapp that gives you an inexact clock in as readable text. So you see "Ten to One" rather than "13:49:45".
wmHexaClock is a dockapp which displays the time in hexadecimal notation. You can choose the foreground color (using the RRGGBB notation) and decide between two different display modes.
wmwork provides a monitor on a 64x64 mini window that helps you keeping track of your time. wmwork is a graphical application designed to work with the WindowMaker dock, but will work with other window managers as well.
wmy2k is a dockapp that displays the time left to the 3rd millennium.
XCclock offers a nice clock and an alarm function.
Dali Clock is a digital clock. When a digit changes, it "melts" into its new shape. The date is displayed when the mouse is pressed. The window can be made transparent, and can do funky psychedelic color cycling.