This week has been about a terminal email client, a document language, a distributed SQLite replicator, a graphics editor, QR codes and new functions in Google Sheets.
An article on the new programming capabilities introduced to Google Sheets in the form of named Functions and lambdas among others.
A document language with xml-like semantics meant to be used both as a serialization format and a configuration language, much like JSON, YAML, or XML.
A terminal email client with support for multiple accounts and Maildir, mbox, IMAP, etc.
You might also want to check Himalaya.
A raster and vector 2D graphics editor powered by a node graph compositing engine providing a non-destructive editing experience.
An article explaining how QR codes work.
A couple of years ago I shared QArt Codes that nicely complements the topic.
A distributed SQLite replicator built on the Multi-Raft fault-tolerant consensus protocol.