diff --git a/systems/cpoint.md b/systems/cpoint.md
index 1bbfd543c839b281bf8c626fda3c9b72dccdd146..77d79b545fe0fef26f96c875b9b601adc0c1280a 100644
--- a/systems/cpoint.md
+++ b/systems/cpoint.md
@@ -10,3 +10,5 @@ end_date: 2008-04
 people:
     - akohlhase
 ---
+CPoint is an extension to MS PowerPoint that allows to add and manage semantic annotations
+in PowerPoint presentations. The system offers various embedded semantic services.  
diff --git a/systems/krextor.md b/systems/krextor.md
index b0385608a7750e92e32793039b828966964e2e92..1357fb5f86d594d35cdb6f835b3da27e8095763d 100644
--- a/systems/krextor.md
+++ b/systems/krextor.md
@@ -2,12 +2,16 @@
 layout: system
 
 title: Krextor
+teaser: An extensible XSLT-based framework for extracting RDF from XML.
 
 start_date: 2008-02
 end_date: 2010-09
 
-people: 
-    - clange
+people:
+- clange
+
+webpage: https://github.com/EIS-Bonn/krextor/wiki
+repository: https://github.com/EIS-Bonn/krextor
 ---
 
-Krextor, the ​KWARC RDF Extractor, is an extensible XSLT-based framework for extracting RDF from XML, supporting multiple input languages as well as multiple output RDF notations. See
+Krextor, the ​KWARC RDF Extractor, is an extensible XSLT-based framework for extracting RDF from XML, supporting multiple input languages as well as multiple output RDF notations.
diff --git a/systems/mws.md b/systems/mws.md
index 31ebe817767e7942b3e0a0dc0d9ee238302871bb..3a71eedbda9319f759f4525b42fca396c18cb36a 100644
--- a/systems/mws.md
+++ b/systems/mws.md
@@ -2,7 +2,7 @@
 layout: system
 
 menu_title: MathWebSearch
-title: MathWebSearch"
+title: MathWebSearch
 teaser: A Mathematical Search Engine
 
 start_date: '2005'
diff --git a/systems/swim.md b/systems/swim.md
index 19cef8f627428328cdb6c1dc37d0a524897eb32e..2043810cc47a64c60de3010a219a2c162d7f20a6 100644
--- a/systems/swim.md
+++ b/systems/swim.md
@@ -2,13 +2,14 @@
 layout: system
 
 title: "SWiM: Semantic Wiki for Mathematics"
+teaser: A Semantic Wiki for Interactive Mathematics.
 
 start_date: 2006-08
 end_date: 2009-06
 
 people: 
-    - mkohlhase
     - clange
+    - mkohlhase 
 ---
 
-SWIM is a Semantic Wiki for Interactive Mathematics. The system has been superseded by [MathHub](/systems/mathhub/).
\ No newline at end of file
+SWIM is a Semantic Wiki for Interactive Mathematics. The system has been superseded by [MathHub](/systems/mathhub/).