Thís application deserves a lot more attention by users if measured by the voting rate.
It's easy to go to and quite logic to operate and not the least technical.
No items are permitted by default, you must actively allow certain applications like chat, incoming and outgoing mail, etc.
When selecting a heading to the right, a very brief description turns up at the left hinting the risk and gains of permitting the protocol. I
If your internet or mail stops working, don't panic! Simply find or guess at the needed permissions or try systematically until it works again.
You could call this the Zonealarm of Linux perhaps. Sort off.
You want this ;-)
An open, cross-platform journaling program.
A scientific plotting package.