iOS/Mac: For whatever reason, Apple's Voice Memos app doesn't sync up with any software on the Mac, which means you have to email recordings to yourself or drop them into a note. If you want something that just automatically syncs, Just Press Record does the job.
Just Press Record includes a Mac app and an iOS app. Anything you record is synced with iCloud so it's easy to access on your computer or your phone. That's all it does. There's no special editing features, no plugins, or anything else. But the fact it syncs up with iCloud makes it worth a look, even if it's a bit expensive to buy both the iOS and OS X versions together.