diff --git a/doc/spades-logo.png b/doc/spades-logo.png
new file mode 100644
index 00000000..7219aa03
Binary files /dev/null and b/doc/spades-logo.png differ
diff --git a/doc/unreal-logo.svg b/doc/unreal-logo.svg
new file mode 100644
index 00000000..ae807db9
--- /dev/null
+++ b/doc/unreal-logo.svg
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   height="666.71118"
+   width="684.71118"
+   viewBox="-150.3282 -273.04775 743.39343 1365.3299"
+   version="1.1"
+   id="svg34"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs24">
+    <clipPath
+       id="a"
+       clipPathUnits="userSpaceOnUse">
+      <path
+         d="M 0,1024 H 1024 V 0 H 0 Z"
+         id="path21" />
+    </clipPath>
+  </defs>
+  <path
+     d="m 658.43312,822.94811 v -94.746 h -35.855 v 122.747 h 120.26 v -28 z"
+     id="path26" />
+  <g
+     clip-path="url(#a)"
+     transform="matrix(1.33333,0,0,-1.33333,-443.82787,1092.2822)"
+     id="g32">
+    <path
+       d="m 498.837,117.958 h 20.085 c 0.498,-5.295 -1.063,-7.971 -5.392,-8.386 -4.293,-0.411 -8.612,-0.76 -12.92,-0.77 -17.903,-0.044 -19.822,2.052 -18.737,19.932 0.02,0.333 0.03,0.666 0.063,0.997 0.67,6.667 3.126,9.189 9.81,9.499 5.15,0.238 10.316,0.089 15.476,0.132 5.373,0.044 10.5,-0.337 11.806,-6.626 h 13.198 c 1.86,10.558 -1.6,16.306 -11.74,16.9 -13.059,0.767 -26.228,0.648 -39.293,-0.086 -8.782,-0.493 -13.292,-5.67 -13.804,-14.27 -0.444,-7.454 -0.42,-14.975 -0.007,-22.434 0.441,-7.953 4.16,-11.928 11.938,-13.918 2.87,-0.734 5.785,-1.29 8.68,-1.928 h 26 c 2.091,0.444 4.177,0.913 6.274,1.328 5.615,1.11 11.135,2.918 12.264,9.28 1.114,6.278 1.061,12.763 1.546,19.515 h -35.247 z m -103.4,63.438 v 91.393 h -26.424 v -69.795 l -54.236,70.22 H 273.38 V 181.28 h 26.308 v 68.354 l 1.226,0.31 53.645,-68.547 z m 47.577,45.635 v 26.323 c 12.208,0 24.12,0.002 36.033,-0.003 1.662,0 3.323,-0.048 4.985,-0.059 14.801,-0.1 16.353,-4.42 14.866,-18.979 -0.484,-4.738 -4.073,-7.103 -8.306,-7.175 -15.731,-0.268 -31.469,-0.107 -47.578,-0.107 m 56.443,-33.406 c 0.357,-4.063 0.548,-8.14 0.82,-12.3 h 26.391 c 0,5.758 0.219,11.061 -0.045,16.34 -0.581,11.61 -2.289,16.735 -13.599,18.696 -0.592,0.103 -1.114,0.614 -2.506,1.42 11.369,2.53 15.442,10.208 15.981,20.201 0.267,4.96 0.176,10.017 -0.484,14.932 -1.604,11.95 -5.993,16.673 -17.761,18.885 a 101.743,101.743 0 0 1 -17.843,1.741 c -22.818,0.197 -45.638,0.09 -68.458,0.066 -1.78,-0.002 -3.559,-0.22 -5.646,-0.36 v -91.884 h 26.535 v 25.35 c 6.04,0 11.509,0.111 16.972,-0.025 9.644,-0.24 19.344,-0.086 28.908,-1.129 7.832,-0.854 10.041,-4.046 10.735,-11.933 m 73.129,24.754 h 68.786 v 18.565 h -68.899 v 16.585 h 72.852 v 19.517 h -99.79 v -91.744 h 101.018 v 20.193 h -73.967 z m -319.109,52.037 c 0.004,0.918 -0.563,1.84 -0.847,2.708 h -26.34 c 0,-16.299 0.052,-32.104 -0.036,-47.909 -0.025,-4.314 -0.31,-8.644 -0.772,-12.935 -0.665,-6.161 -4.552,-10.04 -10.412,-10.334 -12.098,-0.61 -24.283,-1.056 -36.347,-0.266 -9.717,0.635 -12.873,4.996 -12.984,14.895 -0.19,16.997 -0.103,33.998 -0.188,50.997 -0.009,1.895 -0.385,3.789 -0.59,5.67 h -26.32 c 0,-22.846 -0.788,-45.02 0.27,-67.106 0.734,-15.35 7.1,-21.4 22.59,-23.992 22.481,-3.765 45.194,-3.61 67.677,-0.266 17.168,2.553 22.995,8.927 23.753,26.069 0.92,20.79 0.464,41.644 0.546,62.47 m 447.926,-53.371 19.515,38.362 19.723,-38.362 z m 2.8,56.306 -49.975,-92.133 h 28.863 l 8.345,15.905 h 59.333 l 8.375,-15.847 h 29.165 l -50.248,92.075 z m -264.917,-161.351 -1.233,-0.292 a 532757.74,532757.74 0 0 1 -30.02,38.7 h -23.4 v -51.93 h 14.433 v 37.887 l 1.47,0.522 30.288,-38.488 h 23.367 v 51.89 h -14.904 z m 187.996,-0.026 -1.193,-0.31 c -9.93,12.813 -19.858,25.627 -29.476,38.039 H 573.309 V 98.583 h 14.777 v 39.2 l 30.889,-39.43 h 23.009 v 51.189 h -14.702 z m -295.244,7.284 h 39.176 v 10.717 H 332.04 v 9.647 h 41.322 V 150.45 H 317.11 V 98.519 h 57.303 v 11.039 h -42.375 z m 338.914,0.018 h 38.455 v 10.44 H 671.1 v 9.635 h 40.57 v 10.3 H 655.83 V 98.556 h 56.742 v 10.952 h -41.62 z M 545.666,98.416 h 14.301 v 51.189 H 545.666 Z M 312.554,585.913 c 0,0 -10.463,51.999 44.874,114.973 55.342,62.972 96.863,85.871 141.707,97.799 l -0.078,-0.046 0.17,0.046 c 0,0 -35.227,-20.517 -35.227,-51.522 0,-9 1.435,-15.184 3.423,-19.315 2.638,-5.488 6.816,-7.354 10.567,-7.372 3.16,-0.018 5.01,1.281 9.01,2.834 V 555.386 c 0,0 0.433,-2.707 2.863,-5.915 3.5,-4.613 9,-10.243 19.335,-10.3 17.629,0.113 39.802,20.026 39.802,20.026 v 135.964 c 0,13.832 -9.9,30.53 -20.39,36.259 0,0 1.43,0.09 3.744,0.089 6.926,0.002 21.784,-0.79 30.063,-7.115 2.3,2.665 39.418,44.665 105.466,57.589 l -0.032,-0.037 0.18,0.037 c 0,0 -36.531,-43.016 -47.981,-64.348 -2.035,-0.121 -2.332,-40.471 -1.993,-80.79 0.329,-38.92 1.253,-77.818 1.789,-80.509 0,0 3.898,-5.794 13.824,-5.844 11.196,-0.057 30.063,7.195 59.643,38.288 l -10e-4,-10e-4 v 10e-4 c 0,0 -0.78,-1.771 -2.35,-4.908 -8.476,-16.938 -39.974,-73.721 -95.924,-106.725 l -0.003,0.003 -0.005,-0.003 -36.29,30.693 -0.927,0.774 -39.58,-41.967 -0.06,0.006 -0.005,-0.006 c 0,0 -90.232,7.633 -127.92,62.015 l 0.179,-0.065 -0.047,0.065 c 0,0 5.707,-2.221 12.148,-2.342 7.547,-0.138 15.472,2.619 15.472,15.229 v 127.85 c 0,6.529 -4.495,13.853 -14.362,13.825 -8.874,-0.023 -21.614,-5.994 -39.01,-23.843 -36.734,-37.685 -51.99,-73.468 -51.99,-73.468 l -0.025,0.136 -0.06,-0.136 M 513,369.156 c 70.386,0 136.56,27.41 186.33,77.18 49.77,49.771 77.18,115.944 77.18,186.33 0,70.386 -27.41,136.559 -77.18,186.33 -49.77,49.77 -115.944,77.18 -186.33,77.18 -70.386,0 -136.56,-27.41 -186.33,-77.18 -49.77,-49.771 -77.18,-115.944 -77.18,-186.33 0,-70.386 27.41,-136.559 77.18,-186.33 49.77,-49.77 115.944,-77.18 186.33,-77.18"
+       id="path28" />
+    <path
+       d="m 513,908.307 c 152.232,0 275.641,-123.409 275.641,-275.64 0,-152.233 -123.409,-275.642 -275.641,-275.642 -152.232,0 -275.641,123.41 -275.641,275.641 0,152.232 123.409,275.641 275.641,275.641 m 0,-559.119 c 75.72,0 146.907,29.487 200.449,83.03 53.542,53.541 83.028,124.728 83.028,200.448 0,75.72 -29.486,146.907 -83.028,200.45 -53.542,53.54 -124.729,83.026 -200.449,83.026 -75.72,0 -146.907,-29.486 -200.449,-83.028 -53.542,-53.542 -83.028,-124.73 -83.028,-200.449 0,-75.72 29.486,-146.907 83.028,-200.449 C 366.093,378.674 437.28,349.188 513,349.188"
+       id="path30" />
+  </g>
+</svg>
diff --git a/readme.md b/readme.md
index dfef82d5..ad95374c 100644
--- a/readme.md
+++ b/readme.md
@@ -141,6 +141,8 @@ mimalloc is used in various large scale low-latency services and programs, for e
 <a href="https://www.bing.com"><img align="left"  height="50" src="https://upload.wikimedia.org/wikipedia/commons/e/e9/Bing_logo.svg"></a>
 <a href="https://azure.microsoft.com/"><img align="left" height="50" src="https://upload.wikimedia.org/wikipedia/commons/a/a8/Microsoft_Azure_Logo.svg"></a>
 <a href="https://deathstrandingpc.505games.com"><img height="100" src="doc/ds-logo.jpg" style="border-radius=1ex;vertical-align:center"></a>
+<a href="https://docs.unrealengine.com/4.26/en-US/WhatsNew/Builds/ReleaseNotes/4_25/"><img height="100" src="doc/unreal-logo.svg" style="border-radius=1ex;vertical-align:center"></a>
+<a href="https://cab.spbu.ru/software/spades/"><img height="100" src="doc/spades-logo.png" style="border-radius=1ex;vertical-align:center"></a>
 
 # Building