Drop.io — up to 100 MB, password, term of storage, the ability to add/delete files, etc.
Ubuntu One, like dropbox, allows you to share the files with direct links. Don't know how they have limits, but worth a try.
files.mail.ru — though personally I do not like it, but you can come. After registration you will get better.
In General, I think, how important is speed. If you need to share a few text documents, then, in principle, can use any service with the captcha and waiting. If you need to upload more files, search for services which do not limit the speed. Look in the direction of dropbox and similar.