diff --git a/dev-libs/clearsilver/Manifest b/dev-libs/clearsilver/Manifest
new file mode 100644
index 0000000..60c0d18
--- /dev/null
+++ b/dev-libs/clearsilver/Manifest
@@ -0,0 +1,4 @@
+DIST clearsilver-0.11.0.tar.gz 442482 BLAKE2B d78a65b555ae7e81becfb37c3bab73f0523d29f63bbb5137700707e379382e1cc031066541b042b0b59a62d683f60ad7b0f0c1265b36e8800438515e8b470835 SHA512 5573e04ce884cdcb58f94695f00c199800aa28b5d6482533f93b7e7b5d119ec02747602f022f05a102a43af14ea55dc58abad0683d210c753e9b9b65fd05aee2
+EBUILD clearsilver-0.11.0.ebuild 1618 BLAKE2B d93295b8109d51165c8f50b37131856f902085ddd893ab280ec3558c26d856b746319d6fdfd9e6f695d0b656d6af5ec210463fbac716bf001e401a9118ef6011 SHA512 f8c54114ff6128983650970ebec9908d94592cbeff970f2b1aa6ed029c335d8954e97e9a6f907bec272b5eaed64e6a101d18d91d81b72b3b63e8dc2f5849b18b
+EBUILD clearsilver-9999.ebuild 1618 BLAKE2B d93295b8109d51165c8f50b37131856f902085ddd893ab280ec3558c26d856b746319d6fdfd9e6f695d0b656d6af5ec210463fbac716bf001e401a9118ef6011 SHA512 f8c54114ff6128983650970ebec9908d94592cbeff970f2b1aa6ed029c335d8954e97e9a6f907bec272b5eaed64e6a101d18d91d81b72b3b63e8dc2f5849b18b
+MISC metadata.xml 476 BLAKE2B 11dfa0ffc64fa5657602e3e654a8fb9396bdf70e9900b6d06fe13ce84e9328be829801b177d8b47a6f6ca0ed27854c937fb2a7471891331ac26001fbcda24e63 SHA512 250db23504e5f7d5f3c8a389340721bc2898d81546d31a36e4fb5fb18942698ef0862a08f732b5f46a027d298d807785113ee094ccf93d91398d7a5f40be292e
diff --git a/dev-libs/clearsilver/clearsilver-0.11.0.ebuild b/dev-libs/clearsilver/clearsilver-0.11.0.ebuild
new file mode 100644
index 0000000..6d86fb0
--- /dev/null
+++ b/dev-libs/clearsilver/clearsilver-0.11.0.ebuild
@@ -0,0 +1,63 @@
+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools
+
+if [[ ${PV} != *9999* ]]; then
+	SRC_URI="https://github.com/blong42/${PN}/archive/${P}.tar.gz  -> ${P}.tar.gz"
+	KEYWORDS="~amd64"
+	MY_P="${PN}-${P}"
+	S="${WORKDIR}/${MY_P}"
+	ECONF_SOURCE="${S}"
+else
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/blong42/clearsilver.git"
+fi
+
+DESCRIPTION="Clearsilver HTML templating system"
+HOMEPAGE="http://clearsilver.net/"
+LICENSE="BSD-2"
+SLOT="0"
+IUSE="compression gettext apache java python perl ruby csharp"
+
+DEPEND="
+	dev-libs/streamhtmlparser
+	compression? ( sys-libs/zlib )
+"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+src_prepare() {
+	default
+	eaclocal -I m4
+	eautoheader
+	eautoconf
+	# Do not build streamhtmlparser
+	sed -i 's/cs: libs\/libstreamhtmlparser.a/cs:/' "${S}/Makefile"
+	sed -i 's/streamhtmlparser //g' "${S}/Makefile"
+	sed -i 's/$(DLIBS:-l%=$(LIB_DIR)lib%.a)/$(filter-out ..\/libs\/libstreamhtmlparser.a, $(DLIBS:-l%=$(LIB_DIR)lib%.a))/g' "${S}/rules.mk.in"
+	# Fix C99 vararg macros (Fix by flyingdutchman23)
+	sed -i "s/NE_LOG_WARN,f,__VA_ARGS__)/NE_LOG_WARN,f,##__VA_ARGS__)/" "${S}/util/neo_misc.h"
+	sed -i "s/..\/libs\/libstreamhtmlparser.a//g" "${S}/cgi/Makefile"
+	# Use Python 2 in Makefile
+	sed -i "s/scripts\/document.py/python2 scripts\/document.py/g" "${S}/Makefile"
+}
+
+src_compile() {
+	emake
+	emake man
+}
+
+src_configure() {
+	econf \
+		$(use_enable compression) \
+		$(use_enable gettext) \
+		$(use_enable apache) \
+		$(use_enable java) \
+		$(use_enable python) \
+		$(use_enable perl) \
+		$(use_enable ruby) \
+		$(use_enable csharp)
+}
diff --git a/dev-libs/clearsilver/clearsilver-9999.ebuild b/dev-libs/clearsilver/clearsilver-9999.ebuild
new file mode 100644
index 0000000..6d86fb0
--- /dev/null
+++ b/dev-libs/clearsilver/clearsilver-9999.ebuild
@@ -0,0 +1,63 @@
+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools
+
+if [[ ${PV} != *9999* ]]; then
+	SRC_URI="https://github.com/blong42/${PN}/archive/${P}.tar.gz  -> ${P}.tar.gz"
+	KEYWORDS="~amd64"
+	MY_P="${PN}-${P}"
+	S="${WORKDIR}/${MY_P}"
+	ECONF_SOURCE="${S}"
+else
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/blong42/clearsilver.git"
+fi
+
+DESCRIPTION="Clearsilver HTML templating system"
+HOMEPAGE="http://clearsilver.net/"
+LICENSE="BSD-2"
+SLOT="0"
+IUSE="compression gettext apache java python perl ruby csharp"
+
+DEPEND="
+	dev-libs/streamhtmlparser
+	compression? ( sys-libs/zlib )
+"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+src_prepare() {
+	default
+	eaclocal -I m4
+	eautoheader
+	eautoconf
+	# Do not build streamhtmlparser
+	sed -i 's/cs: libs\/libstreamhtmlparser.a/cs:/' "${S}/Makefile"
+	sed -i 's/streamhtmlparser //g' "${S}/Makefile"
+	sed -i 's/$(DLIBS:-l%=$(LIB_DIR)lib%.a)/$(filter-out ..\/libs\/libstreamhtmlparser.a, $(DLIBS:-l%=$(LIB_DIR)lib%.a))/g' "${S}/rules.mk.in"
+	# Fix C99 vararg macros (Fix by flyingdutchman23)
+	sed -i "s/NE_LOG_WARN,f,__VA_ARGS__)/NE_LOG_WARN,f,##__VA_ARGS__)/" "${S}/util/neo_misc.h"
+	sed -i "s/..\/libs\/libstreamhtmlparser.a//g" "${S}/cgi/Makefile"
+	# Use Python 2 in Makefile
+	sed -i "s/scripts\/document.py/python2 scripts\/document.py/g" "${S}/Makefile"
+}
+
+src_compile() {
+	emake
+	emake man
+}
+
+src_configure() {
+	econf \
+		$(use_enable compression) \
+		$(use_enable gettext) \
+		$(use_enable apache) \
+		$(use_enable java) \
+		$(use_enable python) \
+		$(use_enable perl) \
+		$(use_enable ruby) \
+		$(use_enable csharp)
+}
diff --git a/dev-libs/clearsilver/metadata.xml b/dev-libs/clearsilver/metadata.xml
new file mode 100644
index 0000000..88f90f7
--- /dev/null
+++ b/dev-libs/clearsilver/metadata.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+<maintainer type="person">
+<email>flewkey@2a03.party</email>
+<name>Ryan Fox</name>
+</maintainer>
+<use>
+<flag name="compression">Enable HTML compression support</flag>
+<flag name="gettext">Enable gettext message translation</flag>
+<flag name="apache">Build Apache 1.3.x module</flag>
+<flag name="csharp">Build the C# module</flag>
+</use>
+</pkgmetadata>