📚 Accounting Management Software in Linux?

Hi people,

I manage the account of my little association/business, in this moment I work with a spreadsheet and links to the receipts in folders.

I'm looking for a software open source (but not mandatory) that works in Linux (Mandatory) and cross-platform (not mandatory).

Someone use some software to do that here? It will really improve my work against the spreadsheet and links?

Thanks to everyone!