I'd recommend looking at KiCad. KiCad is a complete EDA software, rather than just a schematic capture program. At a glance, that seems like a poor recommendation, but if you learn to create schematics with KiCad, you'll be that much closer to being able to design your own PCBs when the time comes for you to do that, rather than learning some dedicated schematic software and then needing to start from scratch again with KiCad. KiCad is increasingly becoming the EDA software of choice for the open source hardware/maker world.
The latest version of KiCad does allow you to import Eagle projects. However, I haven't always had the best results with the Arduino board files I imported. It's not something I've looked into at all, I just thought the board files might have some info to help me answer a forum question, but didn't want it bad enough to install Eagle.