LinkedIn - LinkedIn is a business-oriented social networking service, mainly used for professional networking.

Img.vision - Image hosting & video hosting for eCommerce sellers

Polywork - Polywork is a professional social network that allows you to post updates about what you're up to (in work, and, if you like, in life too).

UploadHouse - Thumbnail and resize your photos and images

Landing.jobs - Find the right tech job for you

ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.