This is the ejournal and ebook platform provided by John Benjamins. (Subscribed titles are only available.)

Kanji Character-Japanese Dictionary (大漢和辞典), published by Taishukan Shoten, is a Chinese/Japanese dictionary containing 50,000 parent characters and 530,000 idioms, based on research from ancient and modern dictionaries and literature.
On-board 14 volumes (volumes 1-12, "addenda" to index volumes, and supplementary volumes)
Not only can you search by directly inputting a kanji, but you can also use searches by radical, stroke count, and reading, as well as part searches, which are useful when you don't know the reading or radical.

Early English Books Online (EEBO) now contains page images of virtually every work printed in England, Ireland, Scotland, Wales and British North America and works in English printed elsewhere from 1473-1700.
This incomparable collection contains more than 130,000 titles and more than 17 million scanned pages.

Eighteenth Century Collections Online (ECCO) is a comprehensive online archive of the Eighteenth Century Published in the United Kingdom.

The Oxford English Dictionary (OED) is widely regarded as the accepted authority on the English language. It is an unsurpassed guide to the meaning, history, and pronunciation of 600,000 words— past and present—from across the English-speaking world.

Kenkyusha's dictionaries, which are mainly English-Japanese / Japanese-English dictionaries, are searchable online.