Speak launch, has a few diffrent settings to choose from. What Speak Launch does it says the name of the app being launched.

You can make a custom text as well, you can it say the app name by adding [app] into the text box.

E.g "OH MY GOD [app] just launched, it's the end of the world!"

the above settings would make it say "OH MY GOD Cydia just launched, it's the end of the world!" if you where to launch cydia.

You can easily change the text and also disable this tweak in the settings.

PLEASE NOTE: When you install this tweak you dont need to respring after you change the text, just change it as much as you like. Never is a respring needed :)