v11 will feature the ability to do an inline upload to the file/media library, bypassing attachments. There is an attachment manager feature, but it's been progressively deemphasised as the file/media library has been improved and serves the case of someone wanting to do proper file management, with attachments increasingly reserved as a 'throw away' kind of approach. Currently it's online accessible if the simplified attachment UI option is off and you're editing content - but it can be put back in anywhere with template editing:
<a rel="nofollow" title="{!comcode:ATTACHMENT_POPUP} {!LINK_NEW_WINDOW}" target="_blank" href="{$FIND_SCRIPT*,attachment_popup}?field_name={POSTING_FIELD_NAME*}{$KEEP*,0,1}" onclick="window.faux_open(maintain_theme_in_link(this.href)\,'site_attachment_chooser'\,'width=550\,height=600\,status=no\,resizable=yes\,scrollbars=yes'); return false;">{!comcode:ATTACHMENT_POPUP}</a>

v11 for the win :)