HopperHQ.com - Fully automated Instagram scheduler. Create and schedule your posts online.
Img.vision - Image hosting & video hosting for eCommerce sellers
InstaGhost - Upload photos directly from your PC to your Instagram account without needing your phone, schedule...
UploadHouse - Thumbnail and resize your photos and images
Grum - Post on Instagram from your computer!
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.