diff --git a/src/extensions/Array.ts b/src/extensions/Array.ts
new file mode 100644
index 00000000..c95328b5
--- /dev/null
+++ b/src/extensions/Array.ts
@@ -0,0 +1,82 @@
+/*
+ Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+ Copyright (C) 2025 Spacebar and Spacebar Contributors
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+/* https://stackoverflow.com/a/50636286 */
+export function arrayPartition<T>(array: T[], filter: (elem: T) => boolean): [T[], T[]] {
+ const pass: T[] = [],
+ fail: T[] = [];
+ array.forEach((e) => (filter(e) ? pass : fail).push(e));
+ return [pass, fail];
+}
+
+export function arrayRemove<T>(array: T[], item: T): void {
+ const index = array.indexOf(item);
+ if (index > -1) {
+ array.splice(index, 1);
+ }
+}
+
+export function arrayDistinctBy<T, M>(array: T[], selector: (elem: T) => M): T[] {
+ const mapped = new Set<M>();
+
+ return array.filter((item) => {
+ const mappedValue = selector(item);
+ if (mapped.has(mappedValue)) return false;
+
+ mapped.add(mappedValue);
+ return true;
+ });
+}
+
+export function arrayGroupBy<T, M>(array: T[], selector: (elem: T) => M): Map<M, T[]> {
+ const map = new Map<M, T[]>();
+
+ array.forEach((item) => {
+ const mappedValue = selector(item);
+ const existing = map.get(mappedValue);
+ if (existing) existing.push(item);
+ else map.set(mappedValue, [item]);
+ });
+
+ return map;
+}
+
+// https://github.com/TheArcaneBrony/ArcaneLibs/blob/ca7ce2bb57a5dffd891b0b86ec5f358df02735c0/ArcaneLibs/Extensions/CollectionExtensions.cs#L103
+export function arrayDistributeSequentially<T>(array: T[], count: number): T[][] {
+ if (count <= 0) throw new Error("Count must be greater than 0");
+ if (count == 1) return [array];
+
+ const list = array;
+ const groups: T[][] = [];
+ for (let i = 0; i < count; i++) groups.push([]);
+
+ // [1,2,3],[4,5,6],[7,8,9]...
+ for (let i = 0; i < list.length; i++) {
+ const idx: number = Math.floor((i / list.length) * count);
+ // console.log(`${i}/${list.length} -> ${idx}:${groups[idx].length}/{count}`);
+ groups[idx].push(list[i]);
+ }
+
+ return groups;
+}
+
+//region Numerics
+export function arraySum(array: number[]) {
+ return array.reduce((prev, curr) => prev + curr, 0);
+}
+//endregion
diff --git a/src/extensions/Math.ts b/src/extensions/Math.ts
new file mode 100644
index 00000000..0a34aaab
--- /dev/null
+++ b/src/extensions/Math.ts
@@ -0,0 +1,22 @@
+/*
+ Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+ Copyright (C) 2026 Spacebar and Spacebar Contributors
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/log
+export function mathLogBase(num: number, base: number) {
+ return Math.log(num) / Math.log(base);
+}
diff --git a/src/extensions/index.ts b/src/extensions/index.ts
new file mode 100644
index 00000000..53bd443c
--- /dev/null
+++ b/src/extensions/index.ts
@@ -0,0 +1,25 @@
+/*
+ Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+ Copyright (C) 2026 Spacebar and Spacebar Contributors
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+export * from "./Array";
+export * from "./Math";
+
+// TODO: move to a separate file
+export async function sleep(ms: number) {
+ return new Promise((resolve) => void setTimeout(resolve, ms));
+}
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