diff --git a/install_ubuntu_quick.sh b/install_ubuntu_quick.sh
index 971957c47b6871f5f114c8fa56ac8281e4239196..5df0f886849c7540d5a739b53808e8d18ba842e0 100644
--- a/install_ubuntu_quick.sh
+++ b/install_ubuntu_quick.sh
@@ -334,6 +334,29 @@ sudo add-apt-repository "deb [arch=intel64] https://packages.microsoft.com/repos
 # Install by using the apt Command
 sudo apt install code
 
+#-----------------------------------------------------------------------
+# PyCharm.
+# https://ubuntuhandbook.org/index.php/2023/09/install-pycharm-2023-x-ubuntu-22-04/
+
+snap install pycharm-community --classic
+
+#-----------------------------------------------------------------------
+# RCode editor.
+#
+# Download *.deb file at https://www.rcode.dev/.
+#
+# Install with dpkg.
+#$ dpkg -i ~/Downloads/deb/rcode-4.5.0.deb
+
+#-----------------------------------------------------------------------
+# Positron.
+#
+# Download *.deb from assets in
+# https://github.com/posit-dev/positron/releases.
+#
+# Install with dpkg.
+# $ dpkg -i ~/Downloads/deb/Positron-2024.08.0-48.deb
+
 #-----------------------------------------------------------------------
 # Telegram Desktop.