https://mobirise.com/

Retrocomputing 

Retrocomputing is the use of older computer hardware and software in modern times.  Magnetic tapes and disks upon which home computer software was stored are decaying at an alarming rate. In order to preserve game software and information, efforts are underway to copy from these degrading media onto fresh media which will help ensure a long life for the software and make it available for emulation and archiving.

C=TOOLS for MAC

Software development never really stopped. There are many tools available today.

D64QLPlugin

A D64/D71/D81 DiskImage QuickLook Plugin for Mac OS X 10.5

Look at your D64, D71, & D81 files in finder and have fun!

8bit.archives.ql

A D64/D71/D81 DiskImage QuickLook Plugin for Mac OS X 10.5

Allows for QuickLook previewing of C64 disk image files in formats: *.d64, *.d71, *.d81.

C64 Images

This plugin allow you to view the following graphic formats:

Koala, Amica Paint ), FLI Designer, Drazlace V1, Fun Painter 2, Hi-Eddi, Image System Hires, OCP Art Studio V2, AFLI-Editor 

IFF ILBM

This plugin allow you to view  graphic formats.

Supported IFF-features:, ILBM and PBM, 1-8 bitplanes, Extra halfbrite, Hold and modify, Transparency

RECOIL

A viewer of pictures in native formats of classic computers:

Amiga, Amstrad CPC, Apple II, Atari 8-bit, Atari Portfolio, Atari ST, Atari Falcon, BBC Micro, C16, C64, C128, and more.

BmpConverter

Converts BMP images to various graphic formats.

The outcome will be exactly like displayed in the preview picture, except for non-interlaced multicolour-pixel formats. 

C64 YOURSELF

Drop a PNG or JPG <2MB from your filesystem onto the screen to upload and convert your image.
Needs a canvas compatible browser to work. tested with Chrome, Safari5, FF4

DiskImagery64

DiskImagery64 is a portable (Qt 4.2.x-based), open-source D64 disk image editor

Offers a nice GUI with drag-and-drop support between disk images and the local file system. Runs programs or mounts images directly in your favorite emulator. RR-Net support is available and allows to transfer programs and even disk images directly to a C64.

MultiCom

MultiCom bridges two communication ports together.

The ports may be any combination of serial, TCP (client or server) and socket file (client or server). Server ports will allow multiple clients and will merge/broadcast data as apporiate



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VChar64

Developed by Ricardo Quesada from the Retro.Moe blog. 

VChar64 is a character editor for the Commodore 64. Features: Char editing, Tile Support, Map Support, Imports CharPad projects, Imports Koala image files, Imports VICE snapshot images, Exports to Assembly/Raw/Prg, Emulates different Palettes, & Live Preview Modes.

CGTerm

Compiled for OSX Sierra.

CGTerm is a C/G telnet client that lets you connect to C64 telnet BBS:s with the correct colours and the correct font. Also included is a client for 64CHAT called CGChat. Features:
Full C64 screen and keyboard emulation,
File download with protocols,
Keyboard macros.
and more...

SIDPLAY

SIDPLAY is a Commodore 64 SID music player. 

Emulates the sound chip and other internals of the Commodore 64 home computer to play back SID music that was originally written on it. The sound chip of the C64 is called the "Sound Interface Device" or SID, and therefore this music is known as SID music.

ChipMachine

A demoscene/retro Jukebox/spotify-like music player.

Type anything to incrementally search in entire database and
hit enter to play directly. 
Features: Multiformat music player,
Fullscreen demo-like GUI,
Incremental search of ~500,000 songs,
Downloads all music on the fly.

C64 CONVERTER

Convert an PNG/GIF/JPEG to C64 FLI/KOALA (image must be 160×200 or 320×200)

C64 DEBUGGER

This is Commodore 64 code and memory debugger that works in real time. It is quick prototyping tool where you can play with Commodore 64 machine and its internals.

C64 Debugger embeds VICE v2.4 C64 emulation engine created by The VICE Team.