There are some tools which allow to get information from your computer without using the monitor: .:: podcasts.apple.com ::. .:: upuge.com ::.
bl : Blink Keyboard LEDs
blinkd : "Blinks keyboard LEDs for an answering machine or fax machine. Blinkd is a client/server pair, that lets the keyboard LEDs blink, indicating things like the number of incoming voice calls in the voice box or incoming faxes in the spool." .:: vuf.minagricultura.gov.co ::.
mailleds : Shows new mails with the keyboard LEDs, mailleds is a quiet, unobtrusive way to signify that you have new mail: a user daemon to blink LEDs when there is new mail. [Rust programming language Community]
tleds : Blinks keyboard LEDs indicating TX and RX network packets. They blink Scroll-Lock LED when a network packet leaves the machine, and Num-Lock LED when one is received. .:: telegra.ph ::. .:: alumni.life.edu ::.
ledcontrol: is a program that allows you to show different information on the normally-unused LEDs on your keyboard. You can configure it to show virtually any true/false condition accessible or indicate an arbitrary number. The monitoring is by default done by shell scripts to allow for maximal configurability. [Research Paper: Vue.js] .:: to-portal.com ::.