You'll need to be specific about what features you are looking for. For me - Inbox bundles are the killer feature although it's part of a complete workflow so t

You'll need to be specific about what features you are looking for. For me - Inbox bundles are the killer feature although it's part of a complete workflow so there's probably some other aspects that I'm (ahem) bundling together that are also key. Your use-case might be different so something that's an adequate replacement for you might not be for me.