I don't think anyone will be surprised that I love the latest creation of Ken Thompson and Rob Pike: the simple, elegant and preeminently pragmatic Go programming language.
But what makes me specially happy is how fast Go is growing in popularity, not among the masses of redditors (although it has some following even there) or programming language design hobbyists and academics, but among people building real production software and solving real problems.
It almost gives me back some hope for the future of the software industry.