A variety of activities based around timelines and duration.
http://www.mathsframe.co.uk/traintimes.swf

Other resources by this author can be found at:
http://www.mathsframe.co.uk/free_resources.asp

There are 2 clocks with minute and hour hands that can be dragged to set a ‘from’ and a ‘to’ time. The time line shows whole hours and 15 minute intervals. You can annotate directly to this using the built in annotation. Using these tools you can demonstrate how to use a time line to calculate how much time there is between 2 given times.

Instructions
http://www.teacherled.com/2008/10/05/elapsed-time-line/

Resource
http://www.teacherled.com/resources/elapsedtime/elapsetimelineload.html

Drag each time to the correct rectangle above the clock. There are five times given in each puzzle. Stop the clock when you have finished. Can you beat teh best time? There are six levels

Level 1 - half hour intervals
http://www.oswego.org/ocsd-web/games/StopTheClock/sthec1.html

Level 2 - 15-minute intervals
http://www.oswego.org/ocsd-web/games/StopTheClock/sthec2.html

Level 3 - 5-minute intervals
http://www.oswego.org/ocsd-web/games/StopTheClock/sthec3.html

Level 4 - 1-minute intervals
http://www.oswego.org/ocsd-web/games/StopTheClock/sthec4.html

Level 5 - 1-minute intervals
http://www.oswego.org/ocsd-web/games/StopTheClock/sthec5.html

Level 6 - time is given in words
http://www.oswego.org/ocsd-web/games/StopTheClock/sthecR.html

A range of activities to help students understand analogue clocks. What time is it 15 minutes from now? What time was it 5 minutes ago?

http://www.oswego.org/ocsd-web/games/ClassClock/clockres.html

Stop the clock when the time on the analogue clock matches the time given in words. How many points can you earn in 10 rounds?

http://www.oswego.org/ocsd-web/games/BangOnTime/clockwordres.html

Clockwise
Either enter a time and see it displayed on the analogue clock, or click on 'Random' and type in the time shown on the clock. There are three difficulty levels.
http://www.shodor.org/interactivate/activities/ClockWise/

Elapsed Time
Practice finding elapsed time given a starting time and an ending time.
http://www.shodor.org/interactivate/activities/ElapsedTime/

Type in your birth date (and time, if known), and this website will calculate your age to the nearest day (or hour, minute or second depending on how accurately you know your birth time).

http://www.mathcats.com/explore/age/calculator.html

Click on two cards to turn them over. If they match, they are cleared from the board. If not, they remain on the board. How many turns will it take you to clear the board?

http://www.interactivestuff.org/match/maker.phtml?featured=1&id=12

The presented problems ask you to change the time on the right clock. Click Check Answers to see if your answer is correct. Then, click New Problem for start a new problem.
http://nlvm.usu.edu/en/nav/frames_asid_318_g_3_t_4.html?open=instruction...

A large interactive analog clock face, designed to assist in teaching students to tell time using an analog clock. From Ambleside Primary.
http://www.amblesideprimary.com/ambleweb/mentalmaths/clock.html