• Timer 0.1 [8k] {S} Sound alarm at regular intervals  
• Meditation Timer 1.3.1 [15k] Beeps/vibrates at regular intervals (1 minute to 99 hours). Stops after 1-999 stages or counts forever.  
• PocketDoan 3.4.1 [100k] Single and multi-stage meditation timer with audio, vibration, and LED alerts.  

• Chimester 1.8 [22k] Can be set to play a MIDI/WAV file, vibrate, or activate the LED on the hour or any 15 minute increment thereof. Find in Prefs > Other after installation.   

• SilentCue 1.2 [54k] Vibrates Palm device at custom interval ranging from 1 to 60 minutes.  
• Chime 1.2 [781k] Sounds (via voice, chime, or vibration) on the hour, half hour, or quarter hour during a given day/time range.  

/palm | Nov 06, 2011