CostStorage - Super simple cloud storage pricing estimator
WebDrive - WebDrive File Access Client allows you to open and edit server-based files without the additional step of downloading the file.
Backblaze B2 Cloud Storage - The lowest cost cloud storage on the planet: $0.005/GB/Month
Air Explorer - Air Explorer is a software to manage all your multiple cloud drives (like Dropbox, Onedrive, Google Drive, Mega, Mediafire, Box, Hidrive, Yandex, Baidu,...) as well as WebDav and FTP connections.
CloudMounter - CloudMounter for Mac OS X: map Dropbox as network drive, mount OneDrive, Google Drive and Amazon S3; FTP client and WebDAV client.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.