WinLep is described as 'software that compresses JPG images to LEP saving 22%. WinLep compresses JPEG and decompresses LEP, moreover it can display JPEG and LEP compressed files' and is an app in the Photos & Graphics category. There are more than 25 alternatives to WinLep for a variety of platforms, including Windows, Mac, Online / Web-based, Wordpress and Linux. The best alternative is Caesium Image Compressor, which is both free and Open Source. Other great apps like WinLep are RIOT - Radical Image Optimization Tool (Free), ImageOptim (Free Personal, Open Source), XnConvert (Free Personal) and TinyPNG (Freemium).
Caesium Image Compressor lets you compress your pictures up to 90% without visible quality loss. Providing a simple yet effective interface with a real-time preview and multiple image processing at the same time, everyone will be able to reach the best result.
Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files.
ImageOptim is excellent for publishing images on the web (easily shrinks images “Saved for Web” in Photoshop). It's useful for making Mac and iPhone/iPad applications smaller (if you configure Xcode to allow better optimization).
XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux. It supports more than 400 file formats (jpeg, tiff, png, gif, camera raw, jpeg2000, WebP, OpenEXR, ...).
TinyPNG uses smart lossy compression techniques to reduce the file size of your PNG files. By selectively decreasing the number of colours in the image, fewer bytes are required to store the data. The effect is nearly invisible but it makes a very large difference in file size!