Been working on a fishing journal app. Pulls in weather, tides (salt), USGS streamflows (streams), add access points, save notes, make journal entries with catch log, and photo/videos.
Not into fishing and so not the target audience for this, but I just wanted to say this thing jumps out at me as one of those products the excitement over "web 2.0" and the API gold rush was all about. A world of niche web-accessible raw data streams, ready to be processed, combined, added to, and made into something useful by an enterprising developer. Cool project.