user10601: I want to get a list of all (because they are certainly only a few existing) crazyhouse engines. I searched in lichess forum posts by googling "crazyhouse engine" and collected many names and links from 3 different posts.
Initial list, to complete:
Sunsetter
Stockfish (a well known engine, recently implemented for crazyhouse, seems to be the strongest for this variant in this thread, is the default used in lichess for crazyhouse, important news: has beaten jann lee consistently in informal match in this playlist)
Sjeng
Tjchess
Immortal
nebiyu
pulsar
sjaak
Crazyhouse by nathanlo99

user7061: From the computer list of the Crazyhouse Chess Variant Association:

Sjeng
KKFchess
Pulsar
Nebiyu Alien
Imortal
Sjaak
TJchess
TSCP zh
Sunsetter
CrazyWa

And aside from that there is the multi-variant Stockfish that plays Crazyhouse.
And Crazyhouse by nathanlo99

10601: <p>I want to get a list of all (because they are certainly only a few existing) crazyhouse engines. I searched in lichess forum posts by googling "crazyhouse engine" and collected many names and links from 3 different posts.</p>

<p>Initial list, to complete:</p>

<p><a href="http://sunsetter.sourceforge.net/" rel="nofollow noreferrer">Sunsetter</a></p>

<p><a href="https://en.lichess.org/forum/team-crazyhouse-engine-development-and-game-analyses/stockfish-playing-crazyhouse?page=1" rel="nofollow noreferrer">Stockfish</a> (a well known engine, recently implemented for crazyhouse, seems to be the strongest for this variant in this thread, is the default used in lichess for crazyhouse, <a href="https://www.youtube.com/playlist?list=PL-09pBUCdduLOlOZQwwfdZUBaVcgEPuB3" rel="nofollow noreferrer">important news: has beaten jann lee consistently in informal match in this playlist</a>)</p>

<p><a href="https://sjeng.org/indexold.html" rel="nofollow noreferrer">Sjeng</a></p>

<p><a href="http://tonyjh.com/chess/tjchess/" rel="nofollow noreferrer">Tjchess</a></p>

<p><a href="https://sites.google.com/site/deuteriumengine/files/crazyhouse" rel="nofollow noreferrer">Immortal</a></p>

<p><a href="https://sites.google.com/site/dshawul/home" rel="nofollow noreferrer">nebiyu</a></p>

<p><a href="http://www.lanternchess.com/pulsar/" rel="nofollow noreferrer">pulsar</a></p>

<p><a href="http://www.eglebbk.dds.nl/program/chess-download.html" rel="nofollow noreferrer">sjaak</a></p>

<p><a href="https://github.com/nathanlo99/Crazyhouse" rel="nofollow noreferrer">Crazyhouse by nathanlo99</a></p>
 7061: <p>From the <a href="https://sites.google.com/site/zhassociation/computer-zh-engine" rel="nofollow noreferrer">computer list of the Crazyhouse Chess Variant Association</a>:</p>

<ul>
<li><a href="https://sjeng.org/indexold.html" rel="nofollow noreferrer">Sjeng</a></li>
<li><a href="http://web.archive.org/web/20160305200546/http://freespace.virgin.net/andrew.fankk/" rel="nofollow noreferrer">KKFchess</a></li>
<li><a href="http://www.lanternchess.com/pulsar/" rel="nofollow noreferrer">Pulsar</a></li>
<li><a href="https://sites.google.com/site/dshawul/home" rel="nofollow noreferrer">Nebiyu Alien</a></li>
<li><a href="https://sites.google.com/site/deuteriumengine/files/crazyhouse" rel="nofollow noreferrer">Imortal</a></li>
<li><a href="http://www.eglebbk.dds.nl/program/chess-download.html" rel="nofollow noreferrer">Sjaak</a></li>
<li><a href="http://tonyjh.com/chess/tjchess/" rel="nofollow noreferrer">TJchess</a></li>
<li><a href="http://www.tckerrigan.com/Chess/TSCP/Community/" rel="nofollow noreferrer">TSCP zh</a></li>
<li><a href="https://github.com/georgvonzimmermann/Sunsetter" rel="nofollow noreferrer">Sunsetter</a></li>
<li><a href="http://hgm.nubati.net/" rel="nofollow noreferrer">CrazyWa</a></li>
</ul>

<p>And aside from that there is the <a href="https://github.com/ddugovic/Stockfish" rel="nofollow noreferrer">multi-variant Stockfish</a> that plays Crazyhouse.</p>

<p>And <a href="https://github.com/nathanlo99/Crazyhouse" rel="nofollow noreferrer">Crazyhouse by nathanlo99</a></p>
