diff --git a/README.md b/README.md
index 664c046..484d40e 100644
--- a/README.md
+++ b/README.md
@@ -27,11 +27,11 @@ If you prefer an email, contact me at `toolleeo@gmail.com`.
 
 # Summary
 
-To date, **639** apps/tools covered, divided in **43** categories.
+To date, **640** apps/tools covered, divided in **43** categories.
 
 # Index
 
-[Backup](#backup) (8) | [Calculators](#calc) (4) | [Chat and instant messaging](#chat) (8) | [Conversion](#conversion) (6) | [Data management](#data-management) (29) | [Data transfer](#transfer) (29) | [Directory changers](#cd) (8) | [Disk usage analyzers](#disk-analyzer) (8) | [Editors](#editors) (21) | [Email](#email) (11) | [File and file system handling](#file-handling) (32) | [File manager](#file-manager) (10) | [File renamers](#file-renamer) (6) | [File systems](#file-system) (3) | [Font management](#font) (2) | [Funny tools](#funny) (15) | [Games](#games) (33) | [Git and accessories](#git) (22) | [Graphics](#graphics) (15) | [Multimedia](#multimedia) (3) | [Networking](#networking) (16) | [Note taking](#note-taking) (13) | [Office tools](#office) (15) | [Organizers and calendars](#organizers) (13) | [Online search and resources](#online) (7) | [Password managers](#password-manager) (10) | [Productivity](#productivity) (21) | [Programming](#programming) (20) | [Science](#science) (8) | [Security and encryption](#security) (12) | [Shells](#shells) (5) | [Sound and music](#music) (24) | [System monitoring](#monitor) (26) | [System tools](#system) (21) | [Terminals](#terminal) (9) | [Text processing](#text-processing) (34) | [Text search](#text-search) (9) | [Todo managers](#todo-manager) (18) | [Utilities](#utility) (27) | [Versioning](#versioning) (5) | [Viewers](#viewers) (24) | [Web browser](#browser) (16) | [Web development](#webdev) (13)
+[Backup](#backup) (8) | [Calculators](#calc) (4) | [Chat and instant messaging](#chat) (8) | [Conversion](#conversion) (6) | [Data management](#data-management) (29) | [Data transfer](#transfer) (29) | [Directory changers](#cd) (8) | [Disk usage analyzers](#disk-analyzer) (8) | [Editors](#editors) (21) | [Email](#email) (11) | [File and file system handling](#file-handling) (32) | [File manager](#file-manager) (10) | [File renamers](#file-renamer) (6) | [File systems](#file-system) (3) | [Font management](#font) (2) | [Funny tools](#funny) (15) | [Games](#games) (33) | [Git and accessories](#git) (22) | [Graphics](#graphics) (15) | [Multimedia](#multimedia) (3) | [Networking](#networking) (17) | [Note taking](#note-taking) (13) | [Office tools](#office) (15) | [Organizers and calendars](#organizers) (13) | [Online search and resources](#online) (7) | [Password managers](#password-manager) (10) | [Productivity](#productivity) (21) | [Programming](#programming) (20) | [Science](#science) (8) | [Security and encryption](#security) (12) | [Shells](#shells) (5) | [Sound and music](#music) (24) | [System monitoring](#monitor) (26) | [System tools](#system) (21) | [Terminals](#terminal) (9) | [Text processing](#text-processing) (34) | [Text search](#text-search) (9) | [Todo managers](#todo-manager) (18) | [Utilities](#utility) (27) | [Versioning](#versioning) (5) | [Viewers](#viewers) (24) | [Web browser](#browser) (16) | [Web development](#webdev) (13)
 
 Some links to [related resources](#resources).
 
@@ -376,6 +376,7 @@ Some links to [related resources](#resources).
 * [geoiplookup](https://github.com/maxmind/geoip-api-c) - a little application to find geographical and network information of an IP address based no the geoip C API.
 * [ipcalc](http://jodies.de/ipcalc) - "ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range." 
 * [mitmproxy](https://mitmproxy.org/) - An interactive HTTPS proxy.
+* [Optic](https://github.com/opticdev/optic) - Optic's Open Source tools make OpenAPI and API-first practices easy for any team to adopt.
 * [PSSH](https://code.google.com/archive/p/parallel-ssh/) - PSSH provides parallel versions of OpenSSH and related tools. Included are pssh, pscp, prsync, pnuke, and pslurp. The project includes psshlib which can be used within custom applications.
 * [quickserve](https://github.com/charliesome/quickserve) - Quickserve is a very simple HTTP server written in Python that is intended for quickly sharing files on an ad-hoc basis. Aside from opening a port in your firewall if you have one, quickserve requires no set-up and should work with no hassle.
 * [redive](https://github.com/neelkarma/redive) - Trace URL redirections in the terminal.
diff --git a/data/apps.csv b/data/apps.csv
index ce4e3ba..56ed443 100644
--- a/data/apps.csv
+++ b/data/apps.csv
@@ -638,3 +638,4 @@ git,gitsummary,,https://github.com/glenreesor/gitsummary,"A better git status ta
 security,cotp,,https://github.com/replydev/cotp,"Trustworthy, encrypted, command-line TOTP/HOTP authenticator app with import functionality."
 utility,topalias,,https://github.com/CSRedRat/topalias,"Linux alias generator from bash/zsh command history with statistics, written on Python."
 programming,Kool,,https://github.com/kool-dev/kool,"CLI tool that brings the complexities of modern software development making these environments lightweight, fast and reproducible."
+networking,Optic,https://www.useoptic.com/,https://github.com/opticdev/optic,Optic's Open Source tools make OpenAPI and API-first practices easy for any team to adopt.