If you use your Inbox as your to-do list, then this is the app for you!
Many people use their email inbox as their ongoing 'to-do' list. If this is how you operate, then you probably often send yourself emails as reminders.
FWRemindMail is an incredibly simple app to quickly shoot off an email reminder or task to yourself. It's simple- type in your reminder and tap Send. An email containing your reminder that is already addressed to yourself appears, at which point you can send it immediately or edit it further before sending.
FWRemindMail is the much quicker alternative to firing up the Mail app, typing in your email address, entering a subject line, then entering your reminder.