diff --git a/README.md b/README.md
index 503c056..1ea4b93 100644
--- a/README.md
+++ b/README.md
@@ -28,12 +28,17 @@ Currently implemented algorithms are:
 - ACE v1 (LZ77) and v2 (blocked with delta/EXE/sound/picture modes)
 - ARC methods 3–9 (pack, squeeze, crunch, squash) and PAK methods 10–11 (crush, distill)
 - ARJ methods 1–4 and ARJZ (standard LZH and extended DEFLATE)
+- Compact Pro (RLE, LZH+RLE)
+- DiskDoubler (ADn LZSS, DDn block Huffman LZ77, adaptive Huffman, Stac LZS, Compact Pro, LZW)
 - HA (ASC and HSC)
 - LHA (LH1–LH7, LArc LZS/LZ5, PMarc PM1/PM2)
 - RAR 1.5 (custom LZ77 with fixed Huffman tables)
 - RAR 2.0 (block Huffman LZ77 with optional multichannel audio)
 - RAR 3.0 (Huffman LZ77 / PPMd Variant H with VM-based post-filters)
 - RAR 5.0 (Huffman LZ77 with native Delta/E8/E8E9/ARM filters)
+- StuffIt classic methods 1–3, 5, 8, 13–15 (RLE, LZW, Huffman, LZAH, MW, LZSS, Arsenic)
+- StuffIt X methods 0–4, 6 (Brimstone/PPMd, Cyanide/BWT, Darkhorse/LZSS, Deflate, Blend, Iron/BWT)
+- StuffIt X preprocessors (English dictionary, x86 executable transform)
 - ZIP methods 1–6, 9, 96–98 (Shrink, Reduce, Implode, Deflate64, WinZip JPEG, WavPack, PPMd)
 - Zoo (LZD, LH5)