diff --git a/.gitmodules b/.gitmodules
index d2dab7c..5148152 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -85,3 +85,12 @@
 [submodule "app-weather"]
 	path = app-weather
 	url = https://github.com/luwrain/app-weather
+[submodule "app-wiki"]
+	path = app-wiki
+	url = https://github.com/luwrain/app-wiki/
+[submodule "app-download"]
+	path = app-download
+	url = https://github.com/luwrain/app-download/
+[submodule "app-opds"]
+	path = app-opds
+	url = https://github.com/luwrain/app-opds/
diff --git a/app-download b/app-download
new file mode 160000
index 0000000..cc15446
--- /dev/null
+++ b/app-download
@@ -0,0 +1 @@
+Subproject commit cc15446f00dfb24c3e513cc23f0b84be6a8828f3
diff --git a/app-opds b/app-opds
new file mode 160000
index 0000000..fbd00ec
--- /dev/null
+++ b/app-opds
@@ -0,0 +1 @@
+Subproject commit fbd00ecbdf86770984c79f65604ba1e10917693d
diff --git a/app-wiki b/app-wiki
new file mode 160000
index 0000000..b53cbf7
--- /dev/null
+++ b/app-wiki
@@ -0,0 +1 @@
+Subproject commit b53cbf764a8c24a9e40caf1632f4b74b36b54c90
diff --git a/io b/io
index 3443097..d65366a 160000
--- a/io
+++ b/io
@@ -1 +1 @@
-Subproject commit 3443097831ebed82c8a049f5eb81bc878ee7ccbe
+Subproject commit d65366ae4733e86342e6935d0e060fb893a29cbe