https://transfer.sh/ allows uploading from the command line and the browser. Files can be up to 10 GB and be stored up to 14 days. It allows limiting the number of downloads.
# Upload using cURL
https://instant.io/ share and receive files using WebTorrent.
https://send.tresorit.com/ allows anonymous file shares. Files can up up to 5 GB and be stored for up to 7 days.