Baby carrier: ergobaby. This is good up until they're huge (like our 3 year old rides in it sometimes). We also had a baby bjorn but that gave me back pain even when they were tiny.

For a baby monitor, we used a Philips DECT one for both kids - for audio - and later on we added video using a wifi webcam so that we could just use our phones (including remotely with a hole punched through the firewall). We use a LTS LTCIP830MV-W (white webcam with IR illumination). It's the Y-Cam model (you can use Y-Cam FW updates) and it does audio+video.