[DOCS] Mentioned current client applciations

docs/source/user/client_applications.rst

@@ -1,3 +1,14 @@
 Client Applications
 ===================
 
+For now there are only two official cleint applications for everpl: an Android and single-page web application.
+
+An Android client is an open-source application located at https://github.com/dot-cat/creative_assistant_android.
+It's supported by the project author and is developed carefully with attention to software architecture, libraries
+and used software development approaches.
+
+A web-client is much less production-ready. The only task it was created for is to test and demonstrate the newest
+features of everpl. Therefore it's quite unstable and much less elaborate. Frankly speaking, web-client was
+originally started as a laboratory work :). The client is hosted at https://srgk.gitlab.io/test-bootstrap2/.
+Its source code is available at https://gitlab.com/srgk/test-bootstrap2
+