diff --git a/dotnet-developer-projects.md b/dotnet-developer-projects.md
index 15cb798..f344d81 100644
--- a/dotnet-developer-projects.md
+++ b/dotnet-developer-projects.md
@@ -115,6 +115,7 @@ Please sort projects alphabetically and provide a one-line description. GitHub/C
   * [Cricket](https://github.com/fsprojects/Cricket) - Actor library
   * [DateTimeExtensions](https://github.com/kappy/DateTimeExtensions) - Common Date Time operations on the form of extensions to System.DateTime, including holidays and working days calculations on several culture locales.
   * [DeveelDB](https://github.com/deveel/deveeldb) - SQL-99 embeddable database engine for .NET
+  * [Deveel Math](https://github.com/deveel/deveel-math) - A port of Google's Harmony library of the Math components to .NET for the computation of astonomic decimals (numbers with more than 1 million decimal digits)
   * [DiffSharp](https://github.com/gbaydin/DiffSharp) - Automatic Differentiation Library
   * [DnsClient](https://github.com/MichaCo/DnsClient.NET) - A high performant DNS query/lookup library - [Home](http://dnsclient.michaco.net)
   * [DotNetOpenAuth](https://github.com/DotNetOpenAuth) - Library that adds support for your site visitors to login with their OpenIDs by just dropping an ASP.NET control onto your page.