We just released new app at Codecanyon.net: Schedule Twitter App
With “Schedule Twitter App” you can schedule your Tweets in advance, specify the time at which the tweets should be posted on your Twitter profile.
Schedule tweets, links, photos, videos, mention users in scheduled tweets using @user.
Demo and more details at: http://codecanyon.net/item/schedule-...tweets/2652925
Custom development of Facebook/Twitter Apps: http://makedonapps.com/custom-development/