diff --git a/FlatCAMApp.py b/FlatCAMApp.py
index 86f4bc69..ad33b7c9 100644
--- a/FlatCAMApp.py
+++ b/FlatCAMApp.py
@@ -2939,7 +2939,7 @@ class App(QtCore.QObject):
         self.paste_tool.install(icon=QtGui.QIcon('share/solderpastebis32.png'))
 
         self.calculator_tool = ToolCalculator(self)
-        self.calculator_tool.install(icon=QtGui.QIcon('share/calculator24.png'), separator=True)
+        self.calculator_tool.install(icon=QtGui.QIcon('share/calculator16.png'), separator=True)
 
         self.sub_tool = ToolSub(self)
         self.sub_tool.install(icon=QtGui.QIcon('share/sub32.png'), pos=self.ui.menutool, separator=True)
@@ -4394,6 +4394,16 @@ class App(QtCore.QObject):
                 )
                 license_label.setOpenExternalLinks(True)
 
+                attributions_label = QtWidgets.QLabel(
+                    _(
+                        'Some of the icons used are from the following sources: <BR>'
+                        '<div>Icons made by <a href="https://www.flaticon.com/authors/freepik" '
+                        'title="Freepik">Freepik</a> from <a href="https://www.flaticon.com/"             '
+                        'title="Flaticon">www.flaticon.com</a></div><br>'
+                        'Icons by <a target="_blank" href="https://icons8.com">Icons8</a>'
+                    )
+                )
+
                 # layouts
                 layout1 = QtWidgets.QVBoxLayout()
                 layout1_1 = QtWidgets.QHBoxLayout()
@@ -4437,6 +4447,12 @@ class App(QtCore.QObject):
                 self.license_tab_layout.setContentsMargins(2, 2, 2, 2)
                 tab_widget.addTab(self.license_tab, _("License"))
 
+                self.attributions_tab = QtWidgets.QWidget()
+                self.attributions_tab.setObjectName("attributions_about")
+                self.attributions_tab_layout = QtWidgets.QVBoxLayout(self.attributions_tab)
+                self.attributions_tab_layout.setContentsMargins(2, 2, 2, 2)
+                tab_widget.addTab(self.attributions_tab, _("Attributions"))
+
                 self.splash_tab_layout.addWidget(logo, stretch=0)
                 self.splash_tab_layout.addWidget(title, stretch=1)
 
@@ -4545,6 +4561,9 @@ class App(QtCore.QObject):
                 self.license_tab_layout.addWidget(license_label)
                 self.license_tab_layout.addStretch()
 
+                self.attributions_tab_layout.addWidget(attributions_label)
+                self.attributions_tab_layout.addStretch()
+
                 layout3.addStretch()
                 layout3.addWidget(closebtn)
 
diff --git a/README.md b/README.md
index 9a0bc849..62f42f5e 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ CAD program, and create G-Code for Isolation routing.
 - optimized the Transformation Tool both in GUI and in functionality and replaced the entries with QSpinBox
 - fixed an issue with the tool table context menu in Paint Tool
 - made some changes in the GUI in Paint Tool, NCC Tool and SolderPaste Tool
+- changed some of the icons; added attributions for icons source in the About FlatCAM window
 
 4.10.2019
 
diff --git a/share/calculator16.png b/share/calculator16.png
new file mode 100644
index 00000000..94a7e458
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diff --git a/share/calculator24.png b/share/calculator24.png
index 26849d94..da97a8df 100644
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diff --git a/share/distance16.png b/share/distance16.png
index 4e0d2ab1..bce12031 100644
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diff --git a/share/distance32.png b/share/distance32.png
index 39cc3ca6..567e638c 100644
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diff --git a/share/jump_to16.png b/share/jump_to16.png
index e45407d5..24bddf37 100644
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diff --git a/share/jump_to32.png b/share/jump_to32.png
new file mode 100644
index 00000000..5912ae2b
Binary files /dev/null and b/share/jump_to32.png differ
diff --git a/share/move16.png b/share/move16.png
index 5c349fee..7c15a01f 100644
Binary files a/share/move16.png and b/share/move16.png differ
diff --git a/share/move32_bis.png b/share/move32_bis.png
index c6056fe6..82907cb2 100644
Binary files a/share/move32_bis.png and b/share/move32_bis.png differ
diff --git a/share/origin16.png b/share/origin16.png
index 51e5f39b..385623f9 100644
Binary files a/share/origin16.png and b/share/origin16.png differ
diff --git a/share/origin32.png b/share/origin32.png
index 54bb977f..c50d7028 100644
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diff --git a/share/scale32.png b/share/scale32.png
index e6ded178..981e3d77 100644
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diff --git a/share/trash32.png b/share/trash32.png
index 88a41686..885bd991 100644
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