I have been using Gmail Notifier for some time now.. and it's good, does everything I want it to. I only really wanted a different color LED because I hate having the green LED for everything. I don't know if it's the app causing it but I feel like I have to check for email for me to actually receive them.. I'll log onto gmail on my computer and have 6 emails from the current day, and with auto-sync enabled on my phone, still nothing. I wish there was a custom LED notification option like there is with the stock messaging app.