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 - [Ledger](https://github.com/sfischer13/awesome-ledger) - Double-entry accounting on the command-line.
 - [Uncopyright](https://github.com/johnjago/awesome-uncopyright) - Public domain works.
 - [Crypto Currency Tools & Algorithms](https://github.com/kennethreitz/awesome-coins) — Digital currency where encryption is used to regulate the generation of units and verify transfers.
+- [Open Source Supporters](https://github.com/zachflower/awesome-open-source-supporters) - Companies that offer their tools and services for free to open source projects.
 
 
 ## License