DERI Pipes is described as ': Open Source, Extendable, Embeddable Web Data Mashups'. There are three alternatives to DERI Pipes for a variety of platforms, including Linux, Online / Web-based, Self-Hosted solutions, Slack and Windows. The best alternative is IFTTT, which is free. Other great apps like DERI Pipes are Huginn (Free, Open Source) and APIANT (Paid).
Huginn is a system for building agents that perform automated tasks for you online. They can read the web, watch for events, and take actions on your behalf. Huginn's Agents create and consume events, propagating them along a directed graph.