A number of searchable Manx dictionaries – both in electronic and PDF form – have been gathered together on the website ‘Gailck-Hasht’. This wonderful resource, put together by Paul Rogers, also features a number of articles and texts, as well as links to some Irish and Scottish Gaelic dictionaries.
The Gaelg Corpus Search is another excellent resource. Housing a large number of historical Manx texts, this website is fully searchable in Manx and English and can be used to help put Manx words and phrases in context.