What are some alternatives?
Lepton - Lepton image compression: saving 22% losslessly from images at 15MB/s
Format Factory - Format Factory is software that allows the user to convert media into various file formats. The software is a product of PC Free Time, a Chinese software development company. Read more about Format Factory.
ImageOptim - Faster web pages and apps.
Freemake Video Converter - Freemake Video Converter Converts 500+ Formats & Gadgets FREE! Convert to MP4, AVI, MKV, WMV, DVD, Xvid. FREE Download. **Voted Best of 2018** Comes with FREE…
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
HandBrake - HandBrake allows users to easily convert video files into a wide variety of different formats.