Hey, I've been building CANviz - a browser-based CAN bus analyzer. pip install, plug in any USB CAN adapter, opens in your browser. No GUI app to install, works with low cost hardware.
Just shipped v0.2.0 with live signal plotting and bus health stats.
CANopen support (CiA 301 + CiA 402) is coming next. Would love to hear what you'd find most useful.