diff --git a/feed/history/boost_1_66_0.qbk b/feed/history/boost_1_66_0.qbk
index 0f42065a..dc7f8e6e 100644
--- a/feed/history/boost_1_66_0.qbk
+++ b/feed/history/boost_1_66_0.qbk
@@ -154,11 +154,72 @@
 
 Boost's primary test compilers are:
 
-* /TODO/
+* Linux:
+  * Clang: 3.0, 4.0.1, 5.0.1
+  * Clang, C++0x: 3.0
+  * Clang, C++11: 3.0, 3.1, 3.2, 3.3, 3.4, 4.0.1, 5.0.1
+  * Clang, C++14: 3.5.0, 3.6.0, 3.7.1, 3.8.0, 3.9.1, 4.0.0, 4.0.1, 5.0.1
+  * Clang, C++17: 5.0.1
+  * GCC: 4.4.7, 4.5.3, 4.6.3, 4.7.2, 5.4.0, 7.2.0
+  * GCC, C++0x: 4.4.7
+  * GCC, C++11: 4.7.2, 4.7.3, 4.8.5, 4.9.4, 6.4.0, 7.1.0, 7.2.0
+  * GCC, C++14: 5.4.1, 6.3.0, 6.4.0, 7.1.0, 7.2.0, 7.2.1
+  * GCC, C++17: 7.2.0
+  * Intel, C++14: 1800
+* OS X:
+  * Clang: 9.0.0
+* Windows:
+  * GCC: 3.4.5, 4.1.2, 4.2.4, 4.3.3, 4.4.0, 4.5.4
+  * GCC, C++0x: 4.6.4
+  * GCC, C++11: 4.7.3
+  * Visual C++: 7.1, 8.0, 9.0, 10.0, 11.0, 12.0, 14.0, 14.1
+* Android:
+  * Clang: 3.6, 3.7, 3.8
+  * GCC: 4.9, 5.4
+  * GCC, C++14: 6.2
+* FreeBSD:
+  * Clang: 4.0.0
+  * Clang, C++11: 4.0.0
+  * Clang, C++14: 4.0.0
+  * Clang, C++1z: 4.0.0
+* QNX:
+  * QCC, C++0x: 4.4.2
+  * QCC, C++11: 4.7.3
 
 Boost's additional test compilers include:
 
-* /TODO/
+* Linux:
+  * Clang: 3.0, 3.8.1, 4.0.1, 5.0.1
+  * Clang, C++0x: 3.0
+  * Clang, C++11: 3.0, 3.1, 3.2, 3.3, 3.4, 4.0.1, 5.0.1
+  * Clang, C++14: 3.5.0, 3.6.0, 3.7.1, 3.8.0, 3.9.1, 4.0.0, 4.0.1, 5.0.1
+  * Clang, C++17: 5.0.1
+  * GCC: 4.4.7, 4.5.3, 4.6.3, 4.7.2, 5.4.0, 7.2.0
+  * GCC, C++0x: 4.4.7
+  * GCC, C++11: 4.7.2, 4.7.3, 4.8.5, 4.9.4, 5.4.0, 6.4.0, 7.1.0, 7.2.0
+  * GCC, C++14: 5.4.1, 6.3.0, 6.4.0, 7.1.0, 7.2.0, 7.2.1, 8.0.0
+  * GCC, C++17: 7.2.0
+  * Intel, C++14: 1800
+* OS X:
+  * Clang: 6.0.0, 9.0.0
+* Windows:
+  * GCC: 3.4.5, 4.1.2, 4.2.4, 4.3.3, 4.4.0, 4.5.4
+  * GCC, C++0x: 4.6.4
+  * GCC, C++11: 4.7.3, 4.8.1, 4.9.3
+  * GCC, C++14: 5.1.0, 5.2.0, 5.3.0, 6.1.0, 6.2.0, 6.3.0, 6.4.0, 7.1.0
+  * Visual C++: 7.1, 8.0, 9.0, 10.0, 11.0, 12.0, 14.0, 14.1
+* Android:
+  * Clang: 3.6, 3.7, 3.8
+  * GCC: 4.9, 5.4
+  * GCC, C++14: 6.2
+* FreeBSD:
+  * Clang: 4.0.0
+  * Clang, C++11: 4.0.0
+  * Clang, C++14: 4.0.0
+  * Clang, C++1z: 4.0.0
+* QNX:
+  * QCC, C++0x: 4.4.2
+  * QCC, C++11: 4.7.3
 
 [endsect]
 
diff --git a/site-tools/.gitignore b/site-tools/.gitignore
new file mode 100644
index 00000000..0a2101fa
--- /dev/null
+++ b/site-tools/.gitignore
@@ -0,0 +1 @@
+/cache/
diff --git a/site-tools/list-test-compilers.php b/site-tools/list-test-compilers.php
new file mode 100644
index 00000000..62ba3b8b
--- /dev/null
+++ b/site-tools/list-test-compilers.php
@@ -0,0 +1,285 @@
+#!/usr/bin/env php
+<?php
+
+# List the test compilers for a new release.
+
+function main() {
+    $develop_testers = load_testers('develop');
+    $master_testers = load_testers('master');
+
+    echo "[section Compilers Tested]\n";
+    echo "\n";
+    echo "Boost's primary test compilers are:\n";
+    echo "\n";
+    echo write_test_compilers($master_testers);
+    echo "\n";
+    echo "Boost's additional test compilers include:\n";
+    echo "\n";
+    echo write_test_compilers($develop_testers);
+    echo "\n";
+    echo "[endsect]\n";
+}
+
+function write_test_compilers($test_compilers) {
+    // Sort the OS names, putting the main operations systems first.
+    $os_list = array_keys($test_compilers);
+    $priorities = array();
+    foreach($os_list as $os) {
+        $os_lower = strtolower($os);
+        if ($os_lower == 'windows' || $os_lower == 'linux' || $os_lower == 'os x') {
+            $priorities[] = 0;
+        } else {
+            $priorities[] = 1;
+        }
+    }
+    array_multisort($priorities, $os_list);
+
+    $result = '';
+
+    foreach($os_list as $os) {
+        $result .= "* {$os}:\n";
+
+        $compilers = array_keys($test_compilers[$os]);
+        sort($compilers);
+        foreach($compilers as $compiler) {
+            $language_versions = array_keys($test_compilers[$os][$compiler]);
+            sort($language_versions);
+            foreach($language_versions as $language_version) {
+                $compiler_versions = array_keys($test_compilers[$os][$compiler][$language_version]);
+                sort($compiler_versions);
+                $result .= "  * {$compiler}";
+                if ($language_version && $language_version != 'C++03') { $result .= ", {$language_version}"; }
+                $result .= ": ";
+                $result .= implode(", ", $compiler_versions);
+                $result .= "\n";
+            }
+        }
+    }
+
+    return $result;
+}
+
+function load_testers($branch) {
+    $compiler_conversion = array(
+        'GNU C++' => 'GCC',
+        'Microsoft Visual C++' => 'Visual C++',
+        'Intel C++ C++0x mode' => 'Intel',
+        'Clang' => 'Clang',
+    );
+    $url_path = "/development/tests/{$branch}/developer/config_.html";
+    $test_links = get_test_links($branch, $url_path);
+
+    $test_compilers = array();
+
+    foreach($test_links as $link_details) {
+        $test_results = download_test_results(resolve_url_path($link_details['link'], $url_path));
+        if (!$test_results) {
+            echo "No test results for {$branch}:\n";
+            print_r($link_details);
+            echo "\n";
+            continue;
+        }
+
+        $test_results = explode('*********************************************************************', $test_results);
+        $compiler_info = trim($test_results[0]);
+        if (!preg_match('@^(.*)version[ \t]*([0-9.]+)(?:[- ]+.*)?$@m', $compiler_info, $match)) {
+            throw new RuntimeException("Unable to match compiler + version: $compiler_info");
+        }
+        $compiler = trim($match[1]);
+        if (array_key_exists($compiler, $compiler_conversion)) {
+            $compiler = $compiler_conversion[$compiler];
+        } else {
+            echo "Unknown Compiler: {$compiler}\n";
+        }
+        $compiler_version = trim($match[2]);
+        $variables = substr($compiler_info, strlen($match[0]));
+        if (preg_match_all('@^[ \t]*(\w*)[ \t]*=(.*)$@m', $variables, $matches, PREG_SET_ORDER)) {
+            $variables = array();
+            foreach ($matches as $match) {
+                $variables[$match[1]] = $match[2];
+            }
+
+            if (array_key_exists('__QNX__', $variables)) {
+                $compiler = 'QCC';
+            }
+            $language_version = false;
+            if (array_key_exists('__cplusplus', $variables)) {
+                if (preg_match('@^(\d{6})L?$@', $variables['__cplusplus'], $match)) {
+                    if ($match[1] < 201103) {
+                        $language_version = 'C++03';
+                    } else if ($match[1] < 201402) {
+                        $language_version = 'C++11';
+                    } else if ($match[1] < 201406) {
+                        $language_version = 'C++14';
+                    } else if ($match[1] < 201703) {
+                        $language_version = 'C++1z';
+                    } else {
+                        $language_version = 'C++17';
+                    }
+                }
+            }
+            if (!$language_version) {
+                if (array_key_exists('__GXX_EXPERIMENTAL_CXX0X__', $variables)) {
+                    $language_version = 'C++0x';
+                } else if ($compiler == 'GCC' || $compiler == 'Clang') {
+                    $language_version = 'C++03';
+                }
+            }
+            if (!$language_version) {
+                echo "No language version for: {$compiler}\n";
+                print_r($variables);
+                $language_version = 'C++03';
+            }
+        }
+
+        $test_compilers[$link_details['os']][$compiler][$language_version][$compiler_version] = true;
+    }
+
+    return $test_compilers;
+}
+
+function get_test_links($branch, $url_path) {
+    $config_summary_dom = DOMDocument::loadHTML(download_page($url_path));
+    if (!$config_summary_dom) {
+        throw new RuntimeException("Error parsing summary for branch {$branch}");
+    }
+
+    $xpath = new DOMXPath($config_summary_dom);
+
+    // Operating System: Android, Darwin, FreeBSD, etc
+    $os_columns = array();
+    foreach($xpath->query("//table[@class='library-table']/thead/tr[1]/td") as $node) {
+        $colspan = $node->hasAttribute('colspan') ? $node->getAttribute('colspan') : 1;
+        for ($i = 0; $i < $colspan; ++$i) {
+            $os = trim($node->textContent);
+            if (strtolower($os) == 'darwin') { $os = 'OS X'; }
+            $os_columns[] = $os;
+        }
+    }
+
+    // Runner: CrystaX-apilevel-19-armeabi-v7a-gnu-libstdc++, teeks99-02-dc3.5-14-Docker-64on64
+    $runner_columns = array();
+    foreach($xpath->query("//table[@class='library-table']/thead/tr[2]/td") as $node) {
+        $colspan = $node->hasAttribute('colspan') ? $node->getAttribute('colspan') : 1;
+        for ($i = 0; $i < $colspan; ++$i) {
+            $runner_columns[] = trim($node->textContent);
+        }
+    }
+
+    // Toolset name: clang-gnu-linux-3.6, gcc-gnu-4.9, etc.
+    $toolset_columns = array();
+    foreach($xpath->query("//table[@class='library-table']/thead/tr[5]/td") as $node) {
+        $colspan = $node->hasAttribute('colspan') ? $node->getAttribute('colspan') : 1;
+        for ($i = 0; $i < $colspan; ++$i) {
+            $toolset_columns[] = preg_replace('@\s+@', '', $node->textContent);
+        }
+    }
+
+    // config_info links
+    $config_info_columns = array();
+    $config_info_row = $xpath->query("//table[@class='library-table']/tbody/tr".
+        "[td[@class='test-name']/a[text()[normalize-space() = 'config_info']]]");
+    if ($config_info_row->length != 1) {
+        throw new RuntimeException("Unable to find config_info row");
+    }
+    foreach($config_info_row->item(0)->getElementsByTagName("td") as $td_node) {
+        $a_nodes = $td_node->getElementsByTagName("a");
+        if ($a_nodes->length > 1) {
+            throw new RuntimeException("Multiple links in config_info cell");
+        }
+        $link = null;
+        if ($a_nodes->length == 1 && trim($a_nodes->item(0)->textContent) == 'pass' && $a_nodes->item(0)->hasAttribute('href')) {
+            $link = $a_nodes->item(0)->getAttribute('href');
+        }
+        $colspan = $td_node->hasAttribute('colspan') ? $td_node->getAttribute('colspan') : 1;
+        for ($i = 0; $i < $colspan; ++$i) {
+            $config_info_columns[] = $link;
+        }
+    }
+
+    $test_links = [];
+    foreach ($config_info_columns as $index => $link) {
+        if ($link && $os_columns[$index]) {
+            $test_links[] = array(
+                'os' => $os_columns[$index],
+                'runner' => $runner_columns[$index],
+                'toolset' => $toolset_columns[$index],
+                'link' => $link,
+            );
+        }
+    }
+
+    return $test_links;
+}
+
+function download_test_results($url_path) {
+    $frame_link = get_frame_link_from_frameset($url_path);
+    return get_test_results_from_frame(resolve_url_path($frame_link, $url_path));
+}
+
+function get_frame_link_from_frameset($url_path) {
+    $frame_set = DOMDocument::loadHTML(download_page($url_path));
+    if (!$frame_set) {
+        throw new RuntimeException("Error downloading test results frame");
+    }
+
+    $xpath = new DOMXPath($frame_set);
+    $frame_node = $xpath->query("//frame[@name='docframe']");
+    if ($frame_node->length != 1) {
+        throw new RuntimeException("Error getting docframe");
+    }
+    return $frame_node->item(0)->getAttribute('src');
+}
+
+function get_test_results_from_frame($url_path) {
+    $page = DOMDocument::loadHTML(download_page($url_path));
+    if (!$page) {
+        throw new RuntimeException("Error downloading test results");
+    }
+
+    // If $page has links to multiple test results, use the first one.
+    $a_nodes = $page->getElementsByTagName('a');
+    if ($a_nodes->length) {
+        $page = DOMDocument::loadHTML(download_page(
+            resolve_url_path($a_nodes->item(0)->getAttribute('href'), $url_path)));
+        if (!$page) {
+            throw new RuntimeException("Error downloading test results");
+        }
+    }
+
+    $xpath = new DOMXPath($page);
+    foreach($xpath->query("//div[@class='log-linker-output-title']") as $node) {
+        if (preg_match('@^Run \[.*\]: (.*)@', trim($node->textContent), $match)) {
+            do { $node = $node->nextSibling; } while($node && $node->nodeType != XML_ELEMENT_NODE);
+            if (!$node) { return null; }
+            return $node->textContent;
+        }
+    }
+}
+
+function download_page($url_path) {
+    $cache_path = __DIR__."/cache{$url_path}";
+    if (!is_file($cache_path)) {
+        $parent_dir = dirname($cache_path);
+        if (!is_dir($parent_dir)) { mkdir($parent_dir, 0777, true); }
+        $page = file_get_contents("http://www.boost.org{$url_path}");
+        if (!$page) {
+            throw new RuntimeException("Error downloading: {$url_path}");
+        }
+        file_put_contents($cache_path, $page);
+        return $page;
+    } else {
+        return file_get_contents($cache_path);
+    }
+}
+
+function resolve_url_path($url_path, $base) {
+    if (strpos($url_path, ':') !== false) {
+        throw new RuntimeException("Absolute URL");
+    }
+    if ($url_path[0] == '/') { return $url_path; }
+    $base = preg_replace('@[^/]*$@', '', $base);
+    return $base ? $base.$url_path : '/'.$url_path;
+}
+
+main();
\ No newline at end of file