I'm no longer maintaining this project, but I'd love to hand the reigns to somebody who can push it forward.
LegalGrep is a legal review tool. It allows you to search a document for two phrases within a set proximity.
For example, let's say you're an associate doing document review for a class action law suit. Unfortunately, a bunch of the documents you need to review aren't catalogued in West Law or LexisNexis. LG will automatically highlight every passage for you where 'lead' and 'negligence' appear within 10 or 25 words of each other. LG accepts leading and trailing wildcard characters, does bi-directional searches, and is mobile ready!
I wrote LG after a friend told me about how he had to manually highlighted hundreds of documents. It sounded wasteful.