Margin - An email alias to stop spam once and for all
1Password - 1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
InboxKitten - An open-source, disposable email service 💌
HelpSpot Vault - Passwords sent over email live forever, but not with Vault.
BargainBot - Send this bot barcodes or photos to find the cheapest prices
Padlock - Padlock is an open-source password manager that is available as an app for multiple platforms. It can be used on Android and iOS devices, and it can also be installed as a Chrome extension.