DeltaGlider – Store 4TB of build artifacts in 5GB
DeltaGlider is a CLI/SDK similar to `aws s3` or `boto3`. UPLOAD: It stores the first file in a S3 path as a full-size (reference), but saves next uploaded archives as deltas (tiny binary diffs) with respect to the reference. DOWNLOAD: it reconstructs the original file on the fly, bit-perfect and verified with SHA256. Why Xdelta3? It's a compression-aware and block-level binary diff algorithm. Perfect for representing differences between archives, where small changes shift bytes but most content stays the same. It can efficiently delta compress ZIP/JAR/TAR archives up to 99.9%…
What it does
In the maker’s words, at launch
DeltaGlider is a CLI/SDK similar to `aws s3` or `boto3`. UPLOAD: It stores the first file in a S3 path as a full-size (reference), but saves next uploaded archives as deltas (tiny binary diffs) with respect to the reference. DOWNLOAD: it reconstructs the original file on the fly, bit-perfect and verified with SHA256. Why Xdelta3? It's a compression-aware and block-level binary diff algorithm. Perfect for representing differences between archives, where small changes shift bytes but most content stays the same. It can efficiently delta compress ZIP/JAR/TAR archives up to 99.9% between versions, provided the difference in compressed content is overall small. Killer use cases Software versioning, periodic db. backups, JAR, ZIP, TGZ. The impact for us was "2 orders of magnitude" storage price reduction. I hope you can benefit from it too! License: GPLv3 Feedback and contributions are super welcome!
Does the same job
all alternatives →- CSCallFS – S3-style object store in one Go binary (MIT)2025 · github.com · ▲66
We started CallFS after yet another late-night “why did the uploads vanish?” incident. Our small team had stitched together rsync, a fragile NFS mount, and an S3 bucket—none of it observable, all of it waiting to bite us. So we wrote a single-process file service in Go that: • Speaks the S3 API (so existing tooling works). • Stores hot data on local disks for speed; cold data can sit in any S3-compatible bucket. • Exposes Prometheus metrics and JSON logs by default, because “what happened?” shouldn’t be guesswork. • Ships as a ~25 MB static binary—no external deps, MIT license. Today it’s…
ByteRover Memory System for OpenClaw Mar 2026 · ▲146File-based memory for OpenClaw with >92% retrieval accuracy
- ZAZeroFS – A log-structured filesystem for S3Jul 2026 · zerofs.net · ▲128
- DBDiffing Binary FilesAug 2026 · withkord.com · ▲19
My partner reviews a lot of P&IDs (piping and instrumentation diagrams) and the adjacent files involved (excel, docx, pdfs, acd/l5x, etc). In his company, these are usually done in Bluebeam. It's really hard to see the diff + keep track of all the revisions resulted by these iterations. They end up storing files like "rev3_final_redlined.pdf". We've been looking for something close to Github to do these reviews, but haven't found one easy enough for folks with no CLI experience to understand and use (happy to check out more tools if you know any). So I built withkord.com to help with…
- HEHeap Explorer2025 · github.com · ▲73
I wrote a little LD_PRELOAD library that makes it easy to inspect and interact with a running program's glibc heap. It's fun to pause processes, free a bunch of their allocations, then resume them. Most of the time, the processes continue as though nothing happened, but sometimes they do interesting things :)
More dev tools this month
the category →
Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 2d ago · opentrailpaper.com
Launched alongside, November 2025
the whole month →
- IB
Life & fun · Nov 2025 · bitsnpieces.dev
- BBoing▲782
Life & fun · Nov 2025 · boing.greg.technology