Le Dictionnaire des Antiquités Grecques et Romaines de Daremberg et Saglio, shortly known as “Daremberg-Saglio” is now retrievable: you can either browse it, choosing the alphabetical letter or the volume, or perform a query.
Better known as “De Ruggiero”, this useful dictionary is now retrievable, since the copyright expired, at this URL, digitized by Google from the library of the University of Michigan. Another tool to bookmark among your websites!
Owl is an iOS app that, by using data from the Perseus Latin Word Tool, allows a user to lookup any Latin word, locate the root (i.e. the nominative singular for nouns and adjectives or the 1st person singular present active indicative for verbs), and parse the entered form. It gives all possible forms for the word entered. The tool then links the root(s) to the online Lewis & Short dictionary from Perseus, and also from that dictionary, provides links to the works in the Perseus database that are quoted in the dictionary.
I didn’t try it, because I’m not a Mac user, but I thought I’d spread the word 😉