WeTransfer
Recipients download without an account; senders need a free account. Files aren't compressed, and free transfers stay available for up to 3 days.
The size limit deserves a careful read: the official pages on the free plan state up to 10 transfers and 3 GB of total usage in a rolling 30-day window, and some pages also mention 3 GB for a single transfer. In practice the cap applies to the 30-day total: three 1 GB sends use it up. To keep files longer you need the paid plans.