Jakub Kostecki

Up to 200 tech interview questions for startups❓💻

A beautiful note taking app running on Ethereum Blockchain

Subscription access to anything with Slack

Music for the brain to improve focus, meditation & sleep

Block ads and tracking across all mobile browsers and apps

High quality design work on demand from hand-picked talent

Infographic maker based on visual language

Stop manually aggregating ad data. Automate any spreadsheet.

Convert web-visitors into inbound sales calls in 28 seconds

Impact investing meets Capitalism.

Get trustworthy place recommendations from your friends

Library of PowerPoint slides to kickstart your presentation.

Why Investors should have a 'be helpful first' mindset

Insanely fun card game that teaches kids the basics of code

Create crazy fun loops of your favorite video and share it.

The simplest way to post, publish, and share content online

Transform your tweetstorms to Medium posts

A timeline of success & failures of remarkable entrepreneurs

A new way to hire freelancers from LinkedIn

Create image charts on the fly for web, mobile, and email