diff --git a/basis/bootstrap/stage2.factor b/basis/bootstrap/stage2.factor
index ffa878b326..301833a114 100644
--- a/basis/bootstrap/stage2.factor
+++ b/basis/bootstrap/stage2.factor
@@ -106,6 +106,7 @@ CONSTANT: default-components
         "stage2: deployment mode" print
     ] [
         "debugger" require
+        os unix? [ "debugger.unix" require ] when
         "listener" require
     ] if
 
diff --git a/basis/debugger/unix/unix.factor b/basis/debugger/unix/unix.factor
index c82c45d7f3..1f27bc1dbb 100644
--- a/basis/debugger/unix/unix.factor
+++ b/basis/debugger/unix/unix.factor
@@ -1,25 +1,9 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: debugger io kernel math prettyprint sequences system
-io.launcher.unix accessors strings ;
+USING: accessors debugger io kernel math prettyprint sequences
+system unix.signals ;
 IN: debugger.unix
 
-CONSTANT: signal-names
-{
-    "SIGHUP" "SIGINT" "SIGQUIT" "SIGILL" "SIGTRAP" "SIGABRT"
-    "SIGEMT" "SIGFPE" "SIGKILL" "SIGBUS" "SIGSEGV" "SIGSYS"
-    "SIGPIPE" "SIGALRM" "SIGTERM" "SIGURG" "SIGSTOP" "SIGTSIP"
-    "SIGCONT" "SIGCHLD" "SIGTTIN" "SIGTTOU" "SIGIO" "SIGXCPU"
-    "SIGXFSZ" "SIGVTALRM" "SIGPROF" "SIGWINCH" "SIGINFO"
-    "SIGUSR1" "SIGUSR2"
-}
-
-GENERIC: signal-name ( obj -- str/f )
-
-M: signal signal-name n>> signal-name ;
-
-M: integer signal-name ( n -- str/f ) 1 - signal-names ?nth ;
-
 : signal-name. ( n -- )
     signal-name [ " (" ")" surround write ] when* ;
 
diff --git a/basis/io/backend/unix/unix.factor b/basis/io/backend/unix/unix.factor
index 76d6773aa9..dcdc01061c 100644
--- a/basis/io/backend/unix/unix.factor
+++ b/basis/io/backend/unix/unix.factor
@@ -5,7 +5,7 @@ classes.struct combinators destructors destructors.private fry
 io.backend io.backend.unix.multiplexers io.buffers io.files
 io.ports io.timeouts kernel kernel.private libc locals make math
 namespaces sequences summary system threads unix unix.ffi
-unix.stat unix.types ;
+unix.signals unix.stat unix.types ;
 QUALIFIED: io
 IN: io.backend.unix
 
@@ -185,8 +185,6 @@ M: stdin cancel-operation
         size-read-fd <fd> init-fd <input-port> >>size
         data-read-fd <fd> >>data ;
 
-INITIALIZED-SYMBOL: dispatch-signal-hook [ [ drop ] ]
-
 : signal-pipe-fd ( -- n )
     OBJ-SIGNAL-PIPE special-object ; inline
 
diff --git a/basis/openssl/libcrypto/libcrypto.factor b/basis/openssl/libcrypto/libcrypto.factor
index 5879aa338c..1273ba6a21 100644
--- a/basis/openssl/libcrypto/libcrypto.factor
+++ b/basis/openssl/libcrypto/libcrypto.factor
@@ -4,15 +4,14 @@
 ! Tested with OpenSSL 0.9.8a_0 on Mac OS X 10.4.9 PowerPC
 !
 ! export LD_LIBRARY_PATH=/opt/local/lib
-
 USING: alien alien.c-types alien.destructors alien.libraries
-alien.syntax classes.struct combinators system ;
+alien.libraries.finder alien.syntax classes.struct combinators system ;
 
 IN: openssl.libcrypto
 
 << "libcrypto" {
     { [ os windows? ] [ "libcrypto-37.dll" ] }
-    { [ os macosx? ] [ "libcrypto.dylib" ] }
+    { [ os macosx? ] [ { "libcrypto.46.dylib" "libcrypto.44.dylib" } find-library-from-list ] }
     { [ os unix? ] [ "libcrypto.so" ] }
 } cond cdecl add-library >>
 
diff --git a/basis/openssl/libssl/libssl.factor b/basis/openssl/libssl/libssl.factor
index 0f7251ca6a..e1f76347f8 100644
--- a/basis/openssl/libssl/libssl.factor
+++ b/basis/openssl/libssl/libssl.factor
@@ -2,14 +2,14 @@
 ! Portions copyright (C) 2008 Slava Pestov
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien alien.c-types alien.destructors alien.libraries
-alien.parser alien.syntax classes.struct combinators kernel literals
-namespaces openssl.libcrypto system ;
+alien.libraries.finder alien.parser alien.syntax classes.struct
+combinators kernel literals namespaces openssl.libcrypto system ;
 
 IN: openssl.libssl
 
 << "libssl" {
     { [ os windows? ] [ "libssl-38.dll" ] }
-    { [ os macosx? ] [ "libssl.dylib" ] }
+    { [ os macosx? ] [ { "libssl.44.dylib" "libssl.42.dylib" } find-library-from-list ] }
     { [ os unix? ] [ "libssl.so" ] }
 } cond cdecl add-library >>
 
diff --git a/basis/peg/peg.factor b/basis/peg/peg.factor
index e57b83e162..2b12da42e5 100644
--- a/basis/peg/peg.factor
+++ b/basis/peg/peg.factor
@@ -265,15 +265,14 @@ GENERIC: (compile) ( peg -- quot )
 : execute-parser ( word -- result )
     pos get apply-rule process-parser-result ;
 
-: preset-parser-word ( parser -- parser word )
-    gensym [ >>compiled ] keep ;
+: preset-parser-word ( parser -- word parser )
+    gensym swap over >>compiled ;
 
-: define-parser-word ( parser word -- )
+: define-parser-word ( word parser -- )
     ! Return the body of the word that is the compiled version
     ! of the parser.
-
-    2dup swap peg>> (compile) ( -- result ) define-declared
-    swap id>> "peg-id" set-word-prop ;
+    [ peg>> (compile) ( -- result ) define-declared ]
+    [ id>> "peg-id" set-word-prop ] 2bi ;
 
 : compile-parser ( parser -- word )
     ! Look to see if the given parser has been compiled.
@@ -285,7 +284,7 @@ GENERIC: (compile) ( peg -- quot )
     dup compiled>> [
         nip
     ] [
-        preset-parser-word [ define-parser-word ] keep
+        preset-parser-word dupd define-parser-word
     ] if* ;
 
 : compile-parser-quot ( parser -- quot )
diff --git a/basis/unix/signals/signals.factor b/basis/unix/signals/signals.factor
index 5880d3504a..ccf04fa967 100644
--- a/basis/unix/signals/signals.factor
+++ b/basis/unix/signals/signals.factor
@@ -1,9 +1,30 @@
 ! Copyright (C) 2011 Joe Groff.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: assocs io.backend.unix kernel namespaces sequences
-threads ;
+USING: accessors assocs kernel math namespaces sequences threads ;
 IN: unix.signals
 
+CONSTANT: signal-names
+{
+    "SIGHUP" "SIGINT" "SIGQUIT" "SIGILL" "SIGTRAP" "SIGABRT"
+    "SIGEMT" "SIGFPE" "SIGKILL" "SIGBUS" "SIGSEGV" "SIGSYS"
+    "SIGPIPE" "SIGALRM" "SIGTERM" "SIGURG" "SIGSTOP" "SIGTSIP"
+    "SIGCONT" "SIGCHLD" "SIGTTIN" "SIGTTOU" "SIGIO" "SIGXCPU"
+    "SIGXFSZ" "SIGVTALRM" "SIGPROF" "SIGWINCH" "SIGINFO"
+    "SIGUSR1" "SIGUSR2"
+}
+
+TUPLE: signal n ;
+
+GENERIC: signal-name ( obj -- str/f )
+
+M: signal signal-name n>> signal-name ;
+
+M: integer signal-name ( n -- str/f ) 1 - signal-names ?nth ;
+
+SYMBOL: dispatch-signal-hook
+
+dispatch-signal-hook [ [ drop ] ] initialize
+
 <PRIVATE
 
 INITIALIZED-SYMBOL: signal-handlers [ H{ } ]
diff --git a/extra/smalltalk/ast/ast.factor b/extra/smalltalk/ast/ast.factor
index b3f8375587..c4b1d6b8b7 100644
--- a/extra/smalltalk/ast/ast.factor
+++ b/extra/smalltalk/ast/ast.factor
@@ -1,6 +1,7 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: strings arrays memoize kernel sequences accessors combinators ;
+USING: accessors arrays combinators kernel memoize sequences
+strings ;
 IN: smalltalk.ast
 
 SINGLETONS: nil self super ;
diff --git a/extra/smalltalk/classes/classes.factor b/extra/smalltalk/classes/classes.factor
index e6a11917a6..ba91fb9c76 100644
--- a/extra/smalltalk/classes/classes.factor
+++ b/extra/smalltalk/classes/classes.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: kernel namespaces assocs accessors words sequences classes.tuple ;
+USING: accessors assocs classes.tuple kernel namespaces words ;
 IN: smalltalk.classes
 
 INITIALIZED-SYMBOL: classes [ H{ } clone ]
diff --git a/extra/smalltalk/compiler/compiler.factor b/extra/smalltalk/compiler/compiler.factor
index 64bb39c25b..a7fc9f077c 100644
--- a/extra/smalltalk/compiler/compiler.factor
+++ b/extra/smalltalk/compiler/compiler.factor
@@ -4,8 +4,7 @@ USING: accessors arrays assocs combinators continuations fry
 generic kernel locals locals.types math quotations sequences
 sequences.generalizations sets smalltalk.ast smalltalk.classes
 smalltalk.compiler.assignment smalltalk.compiler.lexenv
-smalltalk.compiler.return smalltalk.selectors splitting vocabs
-words ;
+smalltalk.compiler.return smalltalk.selectors splitting words ;
 IN: smalltalk.compiler
 
 GENERIC: compile-ast ( lexenv ast -- quot )
@@ -69,10 +68,7 @@ M: ast-return compile-ast
     [ [ arguments>> ] [ temporaries>> ] bi append ]
     [ body>> [ assigned-locals ] map concat fast-set ] bi
     '[
-        dup dup _ in?
-        [ <local-reader> ]
-        [ <local> ]
-        if
+        dup dup _ in? [ <local-reader> ] [ <local> ] if
     ] H{ } map>assoc
     dup
     [ nip local-reader? ] assoc-filter
diff --git a/extra/smalltalk/compiler/lexenv/lexenv.factor b/extra/smalltalk/compiler/lexenv/lexenv.factor
index 3a7d29e6da..9d952bca34 100644
--- a/extra/smalltalk/compiler/lexenv/lexenv.factor
+++ b/extra/smalltalk/compiler/lexenv/lexenv.factor
@@ -1,8 +1,8 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: assocs kernel accessors quotations slots words
-sequences namespaces combinators combinators.short-circuit
-summary smalltalk.classes ;
+USING: accessors assocs combinators combinators.short-circuit
+kernel namespaces quotations sequences slots smalltalk.classes
+summary words ;
 IN: smalltalk.compiler.lexenv
 
 ! local-readers: assoc string => word
diff --git a/extra/smalltalk/eval/eval.factor b/extra/smalltalk/eval/eval.factor
index 56841beafd..545c1d933c 100644
--- a/extra/smalltalk/eval/eval.factor
+++ b/extra/smalltalk/eval/eval.factor
@@ -1,8 +1,7 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: io.files io.encodings.utf8
-compiler.units smalltalk.parser smalltalk.compiler
-smalltalk.library ;
+USING: compiler.units io.encodings.utf8 io.files
+smalltalk.compiler smalltalk.parser ;
 IN: smalltalk.eval
 
 : eval-smalltalk ( string -- result )
diff --git a/extra/smalltalk/parser/parser.factor b/extra/smalltalk/parser/parser.factor
index 838ae9cafd..452fe8c9b5 100644
--- a/extra/smalltalk/parser/parser.factor
+++ b/extra/smalltalk/parser/parser.factor
@@ -1,7 +1,8 @@
 ! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: peg peg.ebnf smalltalk.ast sequences sequences.deep strings
-math.parser multiline kernel arrays byte-arrays math assocs accessors ;
+USING: accessors arrays assocs byte-arrays kernel math
+math.parser multiline peg.ebnf sequences sequences.deep
+smalltalk.ast strings ;
 IN: smalltalk.parser
 
 ! :mode=text:noTabs=true:
@@ -131,7 +132,7 @@ BinaryMessage = OptionalWhiteSpace
                 OptionalWhiteSpace
                 (UnaryMessageSend | Operand):rhs
                 => [[ selector { rhs } ast-message boa ]]
-                                   
+
 KeywordMessageSegment = Keyword:k OptionalWhiteSpace (BinaryMessageSend | UnaryMessageSend | Operand):arg => [[ { k arg } ]]
 KeywordMessage = OptionalWhiteSpace
                  KeywordMessageSegment:h