diff --git a/scheme-id.scm b/scheme-id.scm
index 1cf4c37..f7f598e 100644
--- a/scheme-id.scm
+++ b/scheme-id.scm
@@ -44,14 +44,26 @@
 (title "Larceny")
 (contact "William Clinger")
 
+(id picrin)
+(title "Picrin")
+(contact "Yuichi Nishiwaki")
+
 (id s7)
 (title "s7")
 (contact "Bill Schottstaedt")
 
+(id s9fes)
+(title "Scheme 9 from Empty Space")
+(contact "Nils Holm")
+
 (id sagittarius)
 (title "Sagittarius Scheme")
 (contact "Takashi Kato")
 
+(id sigscheme)
+(title "SigScheme")
+(contact "Kazuki Ohta")
+
 (id stklos)
 (title "STklos")
 (contact "Erick Gallesio")