Changelog:

https://github.com/horizon-eda/horizon/blob/v2.3.1/CHANGELOG.md

Version 2.3.1

• Bugfixes
  • Board Editor
    • Clearance checks: don't crash on unfilled planes (418f15d)
    • prevent cursor from disappearing after updating planes (5f43810)
  • Schematic Editor
    • Connectivity checks: don't crash if unplaced pin is not connected (1cf64d0)
  • Pool and proejct manager
    • don't crash when closing windows that don't have an open pool/project (268b2f5)

Version 2.3.0

• New features
  • Schematic Editor
    • Net ties (9eaad29)
  • Board editor
    • Support connecting tracks to pads with offset (21840a7)
    • ODB++ output (d84af5e)
    • Thermal relief spoke customisation (c1a568f)
    • Thermal relief rules for overriding thermal style (7e880dc)
    • Board connectivity check to check that all copper features of a net are connected (42eba6a)
  • Editors
    • Tools for cleaning up imported geometry (9e5dec5)
    • View at actual size action (310f974)
  • Pool manager
    • Individual directions for alternate pin names (496129d)
  • 3D preview
    • Support 3D input devices via spacenav (30951a4)
• Enhancements
  • Board Editor
    • Faster copper clearance checks (2718b88)
    • Update planes without blocking the UI and show progress (421e610, 5b490df, deab5f2)
    • STEP export: export arcs in board outline as such (9c3c740)
    • Rules: support matching multiple nets (d2da4b6)
    • Rules: support matching multiple components (50ecfa8)
    • Show layer in check results (ac470c9)
    • Edit plane: support picking net (bac09fd)
    • Fab output window: show message when export is done (1ace3c5)
    • STEP export: improved error reporting (545ca3e)
  • Editors
    • Rules: support cancelling checks (9d96698, 8338a74, e22f1af)
    • Rules: support checking just a single rule (90b24ac)
    • Rules: add option for only showing errors on work layer (c5259b3)
    • Rules: only show markers and error polygons for visible rows (25e6838)
    • Reflow actions in tool bar if ther are too many (b08b6fc)
    • Show tooltips on markers (e3d999a)
    • Non-modal text editing (2d0ac2f)
    • Support German umlauts in texts (969d8d5)
    • Rules: optimize layout (2e6e510, 1843c6a, a29d84f, d457c78, 15ed61e, 3883361)
    • Option for hiding pictures (bbc4815)
  • 3D preview
    • Don't block while rendering layers (e44d858)
    • Improved touchpad and trackpoint navigation (197620c)
    • Animate transitions (8360c01)
    • Toggle projection action (0f7ef03)
  • Schematic editor
    • Draw net line tool: use correct bend mode when starting from power symbols (8d5b13f)
    • Place on board can place all components of a block (c92eabd)
    • Automatically move junctions connected power symbols (670d962)
    • Schematic properties dialog is now separate from project properties (1fc6fb6)
    • Show sheet in undo/redo popup (c0a1a04)
    • Place power symbol tool: open manage power nets dialog if there are none (fd4872d)
    • More checks (fa257a5) - Warn about netlist/schematic connection mismatch (7e0785e)
  • Package editor
    • Show inner layers in 3D preview (a7ad28f)
  • Padstack editor
    • Support setting hole position in parameter program (dec4200)
  • Pool and project manager
    • Also show progress for first pool update by estimating number of files (6e58cf4)
    • Automatically update pool if any item has changed after the last pool update (1b691d1)
  • Pool manager
    • Perform complete pool update when overwriting existing item (bae8ce0)
    • KiCad symbol import: support s-expression symbols from KiCad 6 (3d834e6)
    • KiCad package import: support KiCad version 6 packages (ee37598)
    • Add option for changing default frame/via (4a6074d, 1c6cee7)
  • Project manager
    • Show project's pools (e9b326d)
    • Show spinner while opening schematic/board (09c6818)
    • Remember author and base path when creating new project (b897b0b)
    • Provide suggestion for project name based on title (5923ca7)
  • Symbol editor
    • Hide junctions and hidden text by default (20c6ab9)
• Bugfixes
  • General
    • Prevent logger from getting stuck under high load (10dcbc9)
  • Board editor
    • Router: handle pads with holes in them (b6c0c8a)
    • Gerber export: don't write newline after aperture macro primitive (1a3a6b6)
    • Gerber export: support polygons with arcs in padstacks (0efe0ac)
    • Update airwires after pasting via (edcd404)
    • Edit stackup: don't crash if there are airwires on deleted layers (2cdc9b3)
    • Correctly handle zero-width lines in checks (0e4597a)
  • Schematic editor
    • Move tool: automatically connect extra junctions (172c0c4)
    • Correctly detect changes in project pool (9290159)
    • Connect power symbol placed on pin (f87c896)
  • Editors
    • Round off vertex tool: fix arc orientation for non-convex corners (e21595d)
    • Drag polygon edge tool: properly handle circles (ec8b4d6)
    • Don't try to warp cursor on wayland (ab41b47)
    • More graceful behavior if a tool doesn't end if requested (5066148)
    • Properly escape net names in head-up display (c7c38fc)
    • Align and distribute tool: properly handle texts (ddb3120)
    • Improve handling of non-ASCII characters when editing texts (fa3318d)
    • Rules: prevent UI from locking up while checks are running (db6d567)
    • Rules: don't keep result rows expanded while checks are running (7c98c01)
    • Rules: compute cache once (9052052)
  • Package editor
    • Footprint generator: ensure correct placement of entries with buggy librsvg (282bdec)
  • Symbol editor
    • Support going to check errors (9b8a9a5)
  • Pool/project manager
    • Correctly handle opening files form argv (56b3f08)
    • Correctly open directories in external file browser (972cf17)
  • Project manager
    • Digi-Key stock info provider: properly escape text (eb691cb)
    • Don't crash if a pool update happens on opening a project (351bcd9)

For packagers

• Replace libzip dependency with libarchive (06b7a64)
• New dependency libspnav, if your distribution doesn't include it, you can disable spacenav support by passing WITH_SPNAV=0 to make

Start horizon and draw some schematics and layouts.