Plover - Browser Airdrop - transfer files to anyone, any device
TwIM - A clean, modern messaging app powered by Twitter DMs
Starfiles - File hosting done simple
Google Tone - Broadcast any URL to computers within earshot.
Pocket Drive - Wirelessly transfer files from desktop to iPhone or iPad
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.