Mailtrap - Email Delivery Platform that delivers just in time. Great for businesses and individuals.
SpeedFan - Hardware monitor for Windows that can access digital temperature sensors located on several 2-wire SMBus Serial Bus. Can access voltages and fan speeds and control fan speeds. Includes technical articles and docs.
MailCatcher - MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...
Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.
FakeSMTP - FakeSMTP is a Free Fake SMTP Server with GUI for testing emails in applications easily.
smcFanControl - [Download] smcFanControl 2.