Red Stamp Your Approval (Free)
Email, text, tweet, Facebook, Instagram and paper mail your love in personalized photo cards, notes, with Red Stamp for iPhone and iPad.
Treat Your Valentine to Personalized Cards
You can send personalized greeting cards for Valentines Day or special occasions from iOS app or PC for as little as $1.99. The Treat Card App is available in the iTunes store.
Pingg Your Love
Pingg has ecards designed by artists you can send in email or share on Facebook or Twitter. A yearly subscription for premium designs is $10 per year. If you want to send a lot of Valentines, you can send it to over 250 recipients.
Blue Mountain Freebies
Blue Mountain offers animated beautiful scenes to which you can add a personal message, a free trial and the ability to post to Facebook. These true-hearted sentiments are beautiful and precious.
Make your photos adorable or fu with a single tap, and share them on Twitter, Facebook, and Tumblr via the Instagram app for iOS or Android.
Music is Love, Love is Music
Spotify launched Playlist Poetry to "lovely, desperate, flirty, sad" poetry from song titles, and share the resulting playlist with your Valentine. The site lets you find words or phrases Spotify's library then arrange the resulting song titles into a verse. Spotify then turns the lyrical creation into a playlist you can send on to your sweetheart.
Cute Valentine App
Angela's Valentine for iPhone let's you send beautifully designed Valentine's Day cards to those you love
Disney Where's My Valentine? is a free game features 12 exclusive love-themed levels of Swampy and Perry. Instead of playing this with your Valentine, it may be better to give to the kids, so that you can play other games with your spouse.
Tokii claims it has revolutionized the way couples connect by turning “couples therapy” into an app that entertains, enlightens and maybe arouses couples as "they transform their marriage into a permanent honeymoon." There are games in the app as well as mood meter.
For Sending Quick R-rated Video
Vine is a new Twitter and iPhone app that lets users share six second videos and post it to Twitter. "Please note that Vine videos are not moderated and some may be Not Safe For Work. Of course, this is also true of tweeted images"
For Windows Phone
The Free Valentine apps includes 40 loving SMS , 10 wallpapers, 12 romantic Ideas and 12 romantic gift ideas.
For Last Minute Buying
SuperPages ran a video contest to show how last-minute gifts can be bought with the SuperPages, the guy loves his gal so much he buys her flowers, feeds her cats, runs out of money, finds an ATM machine, a jewelry store and a Japanese restaurant all through the SuperPages app.
The SuperPages app let you search over 200 popular local categories, find it with voice search, call a business or pull up a map with a single tap and make reservations or buy tickets.
Find a Valentine with Mobile Flicks and Flikdate
If you don't have a Valentine Flikdate offers real-time video dating from your phone. You get 90 seconds to be yourself and show off your natural charisma. Flikdate was created by “Digital Cupid” and actress Dominika Wolski, who drew inspiration from the dating scene in Hollywood. Flikdate gives users 25 free fliks per day during the launch period. Just in case there is a pervert alert.
Note: Please let us know what apps you like the best in the comments below.