Gyrocade has Starlight – Mobile Planetarium (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE for a limited time.

Point your iPhone like a magic lens into the night sky, and see in real time what stars, planets, and constellations hover above. Starlight features the smoothest navigation available on the app store, at a blazing 60 frames per second. Not only is this planetarium app fast, it’s beautiful to look at. See constellations come to life against a vibrant backdrop of stars, each colored according to their actual stellar classification. Amaze your friends and educate your kids with this impressive app.

Woo&Doo has PicSee Pro (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE for a limited time.

Creative collages and millions of fun combinations for editing of your photos and for making of original postcards, greeting cards and posters.

Esoteric Development has Tie Right (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

Tie Right eliminates the need for a mirror and offers simple step by step illustrations on six(6) of the most popular and handsome necktie knots known to man. Tie Right also offers two distinct views, each one giving you a unique perspective to ensure that your knots are perfect every time.

AppAnnex, LLC has (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

Get rid of boring RINGTONES or ALERT tones and make yourself a new one! Be the DJ of your iPhone or iPod!

Ringtone DJ is the first and only app that allows you to make UNLIMITED ringtones and alert tones from any song in your iTunes music library and … make it 100% unique by applying professional DJ sound effects.

All you need to do is to choose the song you like, set the Start Time, Duration and press Save. That’s all, it can’t be easier!

The Potential to Us Team has ManageList (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

ManageList is a manager application that supports the management of your events and schedules. Events can be added by simply tapping a few items and inputting text. Because your events can be managed by sorting into a list of things you’ll do today and things you’ll do next, maintenance is surprisingly simple, fast, and clear. With the ability to display an alarm to announce and confirm events ahead of time, all appointments are executed efficiently ensuring you’ll never overlook one again. ManageList is the perfect manager for you.

Tensift has Active Voice: SMS, Email, Facebook and Twitter with your voice (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

Active Voice is the power of your voice in the palm of your hands! Use your voice to send messages and emails. No more tedious typing. Just speak and it’s done. Voice recognition support for 23 languages and accents.

Peaksware, LLC has Cycle Tracker Pro (iTunes Link) in the iTunes App Store for FREE ($4.99 value) for a limited time. Deal expires April 29, 2011.

Whether cycling for leisure or training for a race, Cycle Tracker Pro will track your route, speed and distance. Share your workouts with friends on email, Facebook or Twitter.

Athletes, cyclists and triathletes: use Cycle Tracker Pro to track for all your training and fitness program and data analysis needs- link to TrainingPeaks.com and upload workouts for advanced analysis and tracking.

Get Cycle Tracker Pro and view workout time, pace, speed, calories burned, training intervals, splits, map location in real time, take photos, share workouts, listen to music and receive audio feedback.

tyworld has MyPhoto Albums (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

MyPhoto Albums is a strong competitor to Apple’s iPhoto. It features album management (with private album), photo management, powerful editing tools, much more.

7twenty7 LLC has Postale (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for FREE for a limited time.

Postale enables you to easily create custom postcards using your own photos and a personalized message, then share them instantly through email, Facebook, or Twitter.

You select the layout and theme of your Postale card, place your photo just right, then type in your message. When you’re ready to share it, select one of the 29 retro-styled postage stamps to place on your postcard.

Postale will imprint a unique poststamp right onto your card that shows the date and location that your card was sent from. One more click and you can send your card to your friends and family through email, Facebook, or Twitter.