I’ve been using OptiImage for a while, and while it works fine, I’m curious if there are better options out there. I mean, I’ve heard about ImageMagick and some others, but I’d love to know what you all think. Anyone tried anything that works better? 
I really like ImageMagick! It’s free and open-source, which is a huge plus. I use it for all sorts of image optimization. It might take a bit to get used to, but it’s worth it.
I’ve been using Caesium Image Compressor, and it’s been pretty good! It’s straightforward and does the job without any fuss.
I tried ImageOptim and really liked it too! It’s for Mac mostly, but it works great for optimizing images. Just drag and drop, super easy.
RIOT has been my go-to for a while. It’s lightweight and pretty effective, especially for web images.
FileOptimizer is also worth checking out. I use it for compressing files, and it does images too. Just be careful, as it can sometimes mess with the quality.