diff --git a/lib/dipPackages.ts b/lib/dipPackages.ts
new file mode 100644
index 00000000..ae490d2b
--- /dev/null
+++ b/lib/dipPackages.ts
@@ -0,0 +1,6 @@
+/**
+ * tscircuit - dip-packages
+ */
+export function getDipPackage(pins: number) {
+  return { name: `DIP-${pins}`, pitch: 2.54 }
+}
diff --git a/lib/qfnThermalPadFootprint.ts b/lib/qfnThermalPadFootprint.ts
new file mode 100644
index 00000000..48ced382
--- /dev/null
+++ b/lib/qfnThermalPadFootprint.ts
@@ -0,0 +1,24 @@
+/**
+ * tscircuit/footprinter - QFN IC Footprints with Thermal Pads
+ */
+export interface QfnFootprintOptions {
+  pinCount: 16 | 24
+  pitch?: number // default 0.5mm
+  bodySize?: number // 4x4mm or 5x5mm
+  thermalPadSize?: number
+}
+
+export function generateQfnFootprintJson(options: QfnFootprintOptions) {
+  const pitch = options.pitch ?? 0.5
+  const pinCount = options.pinCount
+  const bodySize = options.bodySize ?? (pinCount === 16 ? 4.0 : 5.0)
+  const thermalPad = options.thermalPadSize ?? bodySize * 0.55
+
+  return {
+    type: "footprint",
+    package: `QFN-${pinCount}`,
+    body: { width: bodySize, height: bodySize },
+    thermalPad: { width: thermalPad, height: thermalPad, pin: "EP" },
+    pitch,
+  }
+}
diff --git a/lib/smaSmbDiodes.ts b/lib/smaSmbDiodes.ts
new file mode 100644
index 00000000..9d60d521
--- /dev/null
+++ b/lib/smaSmbDiodes.ts
@@ -0,0 +1,6 @@
+/**
+ * tscircuit - sma-smb-diodes
+ */
+export function getSma() {
+  return { name: "DO-214AC_SMA", padLength: 1.5 }
+}
diff --git a/lib/soicFootprintModels.ts b/lib/soicFootprintModels.ts
new file mode 100644
index 00000000..f85c0d22
--- /dev/null
+++ b/lib/soicFootprintModels.ts
@@ -0,0 +1,16 @@
+/**
+ * tscircuit/footprinter - Standard SOIC IC Models
+ */
+export function getSoicFootprint(pinCount: 8 | 14 | 16, wide: boolean = false) {
+  const pitch = 1.27
+  const bodyWidth = wide ? 7.5 : 3.9
+  const padLength = 1.5
+  const padWidth = 0.6
+
+  return {
+    package: `SOIC-${pinCount}${wide ? "-WIDE" : ""}`,
+    pins: pinCount,
+    pitch,
+    dimensions: { bodyWidth, padLength, padWidth },
+  }
+}
diff --git a/lib/sot223_dpak.ts b/lib/sot223_dpak.ts
new file mode 100644
index 00000000..fa2e5358
--- /dev/null
+++ b/lib/sot223_dpak.ts
@@ -0,0 +1,8 @@
+export function generateSot223Pads() {
+  return [
+    { pad: 1, x: -2.3, y: -3.0 },
+    { pad: 2, x: 0, y: -3.0 },
+    { pad: 3, x: 2.3, y: -3.0 },
+    { pad: 4, x: 0, y: 3.0 },
+  ]
+}
diff --git a/lib/sot23Packages.ts b/lib/sot23Packages.ts
new file mode 100644
index 00000000..4a14cae7
--- /dev/null
+++ b/lib/sot23Packages.ts
@@ -0,0 +1,6 @@
+/**
+ * tscircuit - sot23-regulators
+ */
+export function getSot23(pins: number) {
+  return { name: `SOT-23-${pins}`, pitch: 0.95 }
+}
diff --git a/lib/sot23_multi_pin.ts b/lib/sot23_multi_pin.ts
new file mode 100644
index 00000000..b491e4b0
--- /dev/null
+++ b/lib/sot23_multi_pin.ts
@@ -0,0 +1,6 @@
+export function getSot23MultiPinDimensions(pinCount: 5 | 6): {
+  pinPitch: number
+  bodyWidthMm: number
+} {
+  return { pinPitch: 0.95, bodyWidthMm: pinCount === 5 ? 1.6 : 1.75 }
+}
diff --git a/lib/to220Package.ts b/lib/to220Package.ts
new file mode 100644
index 00000000..e5ee083f
--- /dev/null
+++ b/lib/to220Package.ts
@@ -0,0 +1,6 @@
+/**
+ * tscircuit - to220-power-package
+ */
+export function getTo220() {
+  return { name: "TO-220", pins: 3, pitch: 2.54 }
+}
diff --git a/lib/to_transistor_footprints.ts b/lib/to_transistor_footprints.ts
new file mode 100644
index 00000000..71c795da
--- /dev/null
+++ b/lib/to_transistor_footprints.ts
@@ -0,0 +1,9 @@
+export function getPowerTransistorFootprint(packageType: "TO220" | "TO247"): {
+  pinPitch: number
+  holeDiameter: number
+} {
+  if (packageType === "TO220") {
+    return { pinPitch: 2.54, holeDiameter: 1.0 }
+  }
+  return { pinPitch: 5.45, holeDiameter: 1.6 }
+}