Archivarius 3000 is a full-featured application to search documents and e-mail on the desktop computer, your local network and removable drives (CD, DVD). The documents can be searched by content, the same as with Internet search engines.
Key features include
Instant full-text search of documents and e-mails. Word form search on 18 languages. Support for LAN (local network) and removable drives (CD, DVD and others). Support for popular formats, document search from MS Office and PDF to TXT. Indexed content search in .EPUB, .MOBI, .CHM, .PDF and many other formats. Searching documents in archives ZIP, ACE, RAR and others. Searching in Outlook, Outlook Express, MS Exchange, Netscape, Thunderbird, PocoMail and The Bat! e-mail messages and their attachments. Searching in Lotus Notes and Lotus Domino databases. Remote searching and documents accessing via Internet. Full Unicode support.
Seems to be discontinued, no updates since 2018, support and sales do not reply to emails.