Alternativy k Presearch pro Opera s licencí open source

• Opera
  Všechny platformy Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Firefox Opera Safari Internet Explorer Vivaldi Browser Xbox Chromecast Windows Mobile Slack Chrome Microsoft Edge Telegram Yandex.Browser
• Licence Open Source
  Jakákoli licence Bezplatná licence Licence Open Source Komerční licence