Seeded new doc page for tracking open source projects that use Catch

docs/opensource-users.md

@@ -0,0 +1,27 @@
+# A selection of Open Source projects using Catch
+
+Catch is great for open source. With it's [liberal license](../LICENSE_1_0.txt) and single-header, dependency-free, distribution 
+it's easy to just drop the header into your project and start writing tests - what's not to like?
+
+As a result Catch is now being used in many Open Source projects, including some quite well known ones.
+This page is an attempt to track those projects. Obviously it can never be complete.
+This effort largely relies on the maintainers of the projects themselves updating this page and submitting a PR
+(or, if you prefer contact one of the maintainers of Catch directly, use the 
+[forums](https://groups.google.com/forum/?fromgroups#!forum/catch-forum)), or raise an [issue](https://github.com/philsquared/Catch/issues) to let us know).
+Of course users of those projects might want to update this page too. That's fine - as long you're confident the project maintainers won't mind.
+If you're an Open Source project maintainer and see your project listed here but would rather it wasn't - 
+just let us know via any of the previously mentioned means - although I'm sure there won't be many who feel that way.
+ 
+## Libraries & Frameworks
+
+### [JSON for Modern C++](https://github.com/nlohmann/json)
+A, single-header, JSON parsing library that takes advantage of what C++ has to offer.
+
+## Applications & Tools
+
+### [Standardese](https://github.com/foonathan/standardese)
+Standardese aims to be a nextgen Doxygen
+
+---
+
+[Home](Readme.md)