It's written in Go, but you only need it to compile the program, not to run it.
RSS feeds are certainly an option, it (will) support multiple accounts.
Inverting the sort order should be fairly trivial, too.
It's not zig-zag reading btw, those are two panes. On the left my regular "Home" timeline, on the right my notifications. Probably needs a bit of a visual divider, though.