The world is moving towards free software. Already there are tons of free software available in the market but people often find it difficult to find them as they are not that popular.
Osalt is a website that lets you find open source alternatives to popular commercial software. Simply browse through the software directory and select the commercial software you want to use. Osalt would show you available open source alternatives for that software with a link to download it.
Details for each software include the operating systems it can be used with. You can also search Osalt by the commercial software, the open source software or the tasks you want to accomplish. So next time you want to spend money on buying a software, make sure you check out Osalt first.