Taeram

I use multitail's --mergeall flag daily for stuff like: multitail --mergeall /var/log/apache2/*error.log

If you're okay having your outgoing mail go through another hop, something like mailgun.com has a free plan if you send less than 10k emails per month.

I had to open this one up in GIMP to figure it out, but it's a .PNG with very cleverly applied alpha-channel transparency and shading. With a white background, you see the room, and with a black background, you see outer space.

It works only because Twitter uses a white background for the thumbnail view, and a black background for the full view.

+1 for Flask